High-Performing Affiliates Best Affiliate Marketing Tools beginners tutorials how to step by step make money online passive income top tools course

20 Best Affiliate Marketing Tools for High-Performing Affiliates

20 Best Affiliate Marketing Tools for High-Performing Affiliates: The Ultimate Toolkit

An Affiliate Marketer often finds themselves juggling various roles daily. From managing finances as an accountant to crafting engaging content, mastering SEO, overseeing product management, navigating social media marketing, and optimizing conversion rates, the breadth of responsibilities is vast.

This constant multitasking, coupled with the demand to remain both efficient and inventive, presents a significant challenge in the affiliate marketer’s journey.

Conquering the complexities of affiliate marketing becomes significantly more manageable with the right tools at your disposal. Equipping yourself with these tools not only streamlines your workflow but also brings a multitude of advantages.

For those balancing a full-time job while aspiring to grow an affiliate business, these tools are a game-changer. They enhance productivity, slicing through your workload and saving precious hours each day. Moreover, affiliate marketing tools are essential for uncovering hidden opportunities—the key to distinguishing yourself in a saturated market by excelling in a specific niche.

High-Performing Affiliates Best Affiliate Marketing Tools beginners tutorials how to step by step make money online passive income top tools course

Fortunately, many of these tools are available at no cost, making them accessible even to those hesitant about making an initial investment in affiliate marketing.

We’ve curated a comprehensive list of indispensable tools to assist you in research, optimization, management, and content creation. Given its extensive utility, you might find yourself referring back to this compilation; consider bookmarking this page for easy access in the future.

Best Affiliate Marketing Tools for High-Performing Affiliates

Niche Research and Keyword Analysis

Best Affiliate Marketing Tools beginners tutorials how to step by step make money online passive income top tools course

Niche Research and Keyword Analysis are critical components in the arsenal of any successful affiliate marketer. They serve as the groundwork for devising strategies that target specific market segments with high potential for revenue. Let’s dive deeper into the tools you mentioned and understand their significance and application in this context.

1. Long Tail Pro

  • What It Is: Long Tail Pro is a powerful keyword research tool designed to help marketers find low-competition keywords. These keywords, often referred to as “long-tail” keywords, consist of three or more words. They are more specific than generic keywords and usually have a lower search volume but higher conversion rates due to their specificity.
  • Why It’s Important: In affiliate marketing, competition can be fierce. Long Tail Pro enables marketers to identify niche-specific keywords that are easier to rank for in search engines. By targeting these keywords, affiliates can drive targeted traffic to their websites more efficiently, which is more likely to convert into sales or leads.
  • How to Use It: Users can start by inputting seed keywords related to their niche. Long Tail Pro then generates a list of related long-tail keywords, complete with performance metrics such as search volume, competition level, and estimated profitability. Marketers can then evaluate these suggestions to identify the most promising keywords for their content strategy.

2. AmaSuite

  • What It Is: AmaSuite is a suite of tools specifically designed to analyze Amazon for profitable niche products. It digs deep into Amazon’s vast product catalog to uncover items that affiliates can promote.
  • Why It’s Important: For affiliates focusing on promoting products from Amazon, understanding which products are not only popular but also less saturated with competition can significantly impact their earnings. AmaSuite provides detailed insights into product demand, competition, and potential profitability.
  • How to Use It: Affiliates can use AmaSuite to research products in specific categories, analyze reviews and ratings to gauge customer satisfaction, and identify product trends. This information can inform their product selection process, helping them to choose items with high sales potential and low competition.

3. Google Keyword Planner

  • What It Is: A free tool offered by Google that allows users to research and analyze keywords for their search engine optimization (SEO) and pay-per-click (PPC) campaigns. It provides data on search volume, competition, and trends for keywords across Google’s network.
  • Why It’s Important: Keyword research is fundamental to successful SEO and PPC campaigns. Google Keyword Planner helps marketers understand how users are searching for their products or services and the level of competition for those keywords. This insight is crucial for planning effective content strategies and ad campaigns.
  • How to Use It: To use Google Keyword Planner, you’ll need a Google Ads account. Once logged in, you can enter seed keywords to discover new keyword ideas, see historical statistics, how often keywords are searched, and how those searches have changed over time. This data helps in optimizing website content and ads to better match potential customers’ search queries.

In essence, niche research and keyword analysis tools like Long Tail Pro, AmaSuite, and Google Keyword Planner equip affiliate marketers with the insights needed to make informed decisions about their content and promotion strategies. By effectively using these tools, marketers can identify lucrative niches, select the right keywords, and position their offerings to meet the specific needs of their target audience, ultimately driving more traffic and increasing conversions.

Content Creation and Optimization

Best Affiliate Marketing Tools beginners tutorials how to step by step make money online passive income top tools course

Content Creation and Optimization form the heart of affiliate marketing, ensuring that the information presented to the audience is not only compelling and engaging but also optimized for search engines. This requires a mix of creativity, strategic planning, and utilization of tools designed to refine and enhance content quality. Let’s elaborate on the tools you’ve mentioned, each serving a unique role in this process.

4. WordPress

  • What It Is: WordPress is a versatile content management system (CMS) that powers a significant portion of the web, including many affiliate marketing sites. It’s known for its ease of use, flexibility, and vast ecosystem of themes and plugins.
  • Why It’s Important: For affiliate marketers, WordPress offers a robust platform to create, manage, and optimize their websites. Its plugins extend functionality for SEO, speed optimization, security, and more, while themes allow for the creation of visually appealing sites without needing to code.
  • How to Use It: Marketers can use WordPress to launch their affiliate sites quickly, choosing from thousands of themes to get the right look. Plugins like Yoast SEO help in optimizing content and technical SEO aspects, whereas custom post types and fields allow for content to be tailored to the unique needs of an affiliate marketing strategy.

5. Grammarly

  • What It Is: Grammarly is a writing assistant that checks for grammar, punctuation, and style errors, making suggestions to improve the overall quality of the content.
  • Why It’s Important: Clear, error-free writing is essential for establishing credibility and engaging the reader. Grammarly helps ensure content is not only grammatically correct but also clear and engaging, which can affect the site’s trustworthiness and user engagement rates.
  • How to Use It: Integrating Grammarly into the content creation workflow is straightforward, with browser extensions, desktop apps, and integration with writing platforms. It can be used to review blog posts, emails, and any content before publication to catch and correct errors.

6. Copyscape

  • What It Is: Copyscape is an online plagiarism checker that scans the web for content that matches the text entered by the user, helping to ensure content uniqueness.
  • Why It’s Important: Unique content is vital for SEO and maintaining a website’s integrity. Plagiarism, intentional or not, can lead to search engine penalties and damage to reputation. Copyscape helps prevent these issues by ensuring content is original.
  • How to Use It: Before publishing content on a website, it can be checked through Copyscape to find potential duplicates on the web. This step should be part of the publishing process to avoid SEO penalties and ensure the content’s uniqueness.

7. Canva

  • What It Is: Canva is a graphic design tool that simplifies the creation of visual content, such as infographics, social media images, banners, and more.
  • Why It’s Important: Visual content can make articles more engaging and shareable. It’s crucial for breaking up text, illustrating points, and attracting social media shares and links. Canva’s ease of use allows marketers to create professional-quality graphics without needing a design background.
  • How to Use It: Affiliate marketers can use Canva to design visuals for blog posts, social media, and promotional materials. With templates and drag-and-drop functionality, it’s easy to create graphics that enhance the visual appeal of content and support the written message.

8. CoSchedule Headline Analyzer

  • What It Is: This tool analyzes headlines to provide scores based on factors like word balance, length, sentiment, and keywords.
  • Why It’s Important: The headline is often the first thing a potential reader sees. A compelling headline can significantly increase click-through rates from search engines and social media. CoSchedule’s Headline Analyzer helps marketers craft headlines that are likely to attract more attention.
  • How to Use It: Enter potential headlines into the tool to receive a score and feedback on how to improve it. Experimenting with different formulations based on the tool’s suggestions can lead to headlines that better capture interest and drive traffic.

9. Buzzsumo

  • What It Is: Buzzsumo is a tool for content research and analysis, providing insights into content performance across the web.
  • Why It’s Important: Understanding what content resonates with your audience can guide content strategy, helping to produce more of what works. Buzzsumo allows marketers to see what content is most shared and engaged with, identifying trends and topics that are likely to perform well.
  • How to Use It: By entering keywords, domains, or topics, affiliate marketers can discover the most popular content within their niche. This information can inspire new content ideas, strategies for improving engagement, and opportunities for content promotion.

Leveraging these tools in content creation and optimization processes can significantly improve the quality and performance of affiliate marketing efforts, ensuring content not only reaches the target audience but also engages them effectively and drives conversions.

Email Marketing and Optimization

Email Marketing and Optimization best affiliate mareting tools

Email Marketing and Optimization are pivotal elements in nurturing and converting leads in the affiliate marketing journey. By effectively leveraging tools designed for these purposes, marketers can significantly enhance their engagement strategies and conversion rates. Let’s delve into the specifics of Drip, OptinMonster, and Instapage, highlighting their roles and benefits in the affiliate marketing ecosystem.

10. Drip

  • What It Is: Drip is an email marketing automation platform that provides sophisticated tools for creating and deploying personalized email campaigns. It’s designed to nurture leads through targeted content, based on their interactions with your site and their position in the buying cycle.
  • Why It’s Important: Personalization and automation in email marketing can drastically improve engagement rates, customer retention, and conversions. Drip enables affiliate marketers to send highly relevant content to segments of their audience automatically, increasing the likelihood of moving leads through the sales funnel successfully.
  • How to Use It: Affiliate marketers can use Drip to segment their email list based on various criteria such as past purchases, browsing behavior, and engagement levels. They can then create automated email sequences that deliver personalized content and product recommendations. Drip’s analytics features also allow for the tracking of campaign performance, enabling continuous optimization.

11. OptinMonster

  • What It Is: OptinMonster is a powerful lead generation software that helps in creating and integrating highly effective opt-in forms on websites. It offers a range of features including exit-intent technology, which triggers a targeted campaign at the moment a visitor is about to leave the site.
  • Why It’s Important: Growing an email list is fundamental to the success of affiliate marketing efforts. OptinMonster assists in not just expanding the email list but also in improving the quality of leads through targeted opt-in forms. This results in a higher conversion rate as the audience is more engaged and interested in the content and products being promoted.
  • How to Use It: Marketers can create various types of opt-in forms, such as pop-ups, floating bars, and fullscreen welcome mats. These can be customized to match the look and feel of the marketer’s site and targeted to appear based on specific user behaviors. A/B testing features allow for experimenting with different messages and designs to find the most effective options.

12. Instapage

  • What It Is: Instapage is a landing page platform that focuses on maximizing conversions through the creation of highly optimized landing pages. It offers a drag-and-drop builder, template library, and advanced features like A/B testing and heatmaps.
  • Why It’s Important: For affiliate marketers, landing pages are a critical tool for converting traffic from email campaigns into sales or leads. Instapage enables the creation of landing pages that are specifically designed to match the messaging of email campaigns, providing a cohesive and targeted experience that can significantly increase conversion rates.
  • How to Use It: Marketers can use Instapage to build landing pages that are directly linked from their email campaigns, ensuring a seamless transition for the user from email to landing page. Customization options allow for the inclusion of specific product details, special offers, and calls to action that resonate with the target audience. The platform’s optimization tools, like A/B testing and real-time analytics, help in refining these pages to achieve the highest possible conversion rates.

Together, Drip, OptinMonster, and Instapage create a powerful ecosystem for email marketing and optimization. By integrating these tools into their strategies, affiliate marketers can effectively grow their email lists, engage their audience with personalized content, and convert leads with optimized landing pages. This holistic approach not only elevates the effectiveness of affiliate marketing campaigns but also enhances the overall user experience, leading to sustained growth and profitability.

SEO and Site Optimization

SEO and Site Optimization are essential practices for affiliate marketers to improve their website’s visibility, attract more traffic, and enhance user engagement. Utilizing tools like Ahrefs, SEMRush, Google Search Console, and Yoast SEO can significantly contribute to a site’s success in search rankings. These tools offer a range of functionalities designed to tackle various aspects of SEO, from keyword research to technical site health. Let’s take a closer look at each.

13. Ahrefs and SEMRush

  • What They Are: Ahrefs and SEMRush are comprehensive SEO platforms that provide a plethora of tools for digital marketing professionals. These include keyword research, backlink analysis, competitor analysis, and site audits.
  • Why They’re Important: The ability to analyze and understand your site’s and competitors’ SEO performances is crucial in formulating effective strategies. Ahrefs and SEMRush give insights into which keywords to target, where your site might be lacking in terms of SEO, and how your competitors are achieving their rankings. This information is invaluable for crafting strategies that can help you outperform your competition.
  • How to Use Them: Use these platforms to conduct keyword research for your content strategy, ensuring you target terms with high traffic potential and reasonable competition. Regular site audits can identify SEO issues like broken links, slow page load times, and content duplication. Backlink analysis tools help you understand your site’s link profile and identify opportunities for acquiring new, high-quality links.

14. Google Search Console

  • What It Is: A free tool provided by Google that helps website owners monitor and maintain their site’s presence in Google Search results. It offers data on search traffic, performance, and technical issues that might affect your site’s search ranking.
  • Why It’s Important: Having direct feedback from Google regarding how it views your website is invaluable for SEO. Google Search Console can alert you to issues that could impact your rankings, provide insights into the keywords people use to find your site, and show how effectively your site appears in search results.
  • How to Use It: Verify your website with Google Search Console to start receiving data. Regularly review your site’s performance metrics, and pay close attention to any crawl errors or security issues reported. Use the information provided to optimize your site’s content for better search visibility and rectify any errors that might hinder your site’s performance in Google Search.

15. Yoast SEO

  • What It Is: Yoast SEO is a widely-used WordPress plugin that offers a comprehensive suite of tools to improve your website’s SEO. It covers everything from generating sitemaps to optimizing meta tags and content analysis.
  • Why It’s Important: Yoast SEO simplifies the process of website optimization for search engines. It provides easy-to-follow recommendations for improving your content’s SEO and ensures that the technical aspects of your site’s SEO are handled efficiently.
  • How to Use It: After installing Yoast SEO on your WordPress site, use it to analyze your content for SEO and readability. Follow its recommendations to improve your titles, meta descriptions, use of keywords, and internal linking. Ensure your content is optimized for the focus keywords you want to rank for. Yoast also helps in creating XML sitemaps and implementing schema markup, which are crucial for search engine understanding and indexing your content.

Integrating these tools into your SEO and site optimization efforts can provide a solid foundation for improving your site’s search engine rankings. By continuously monitoring your site’s performance and making the necessary adjustments based on insights from these tools, you can enhance your visibility in search results, attract more targeted traffic, and ultimately, achieve better conversion rates in your affiliate marketing endeavors.

Social Media and Project Management

In the fast-paced realm of affiliate marketing, managing projects and maintaining a strong social media presence are crucial components of success. Effective communication and streamlined workflows can significantly impact the efficiency and outcome of marketing campaigns. Tools like Slack and Buffer have become indispensable for these aspects, offering solutions that cater to the nuanced demands of social media and project management within the affiliate marketing sector. Let’s delve into how these tools play a pivotal role.

16. Slack

  • What It Is: Slack is a communication platform designed to improve team interactions, making it easier to manage tasks and share information in real-time. Its features include direct messaging, group channels, file sharing, and integration with various productivity and project management tools.
  • Why It’s Important: For affiliate marketing teams, whether they’re in-house or distributed across the globe, Slack facilitates seamless communication and collaboration. It’s a central hub where team members can coordinate on projects, discuss strategies, share updates, and consolidate communication, reducing the need for lengthy email threads and meetings.
  • How to Use It: Utilize Slack by creating channels for different projects, topics, or teams to keep conversations organized. You can integrate it with tools like Google Drive for sharing documents, Trello or Asana for project management, and even social media platforms for alerts on brand mentions. This keeps everyone on the same page and fosters a collaborative working environment that can adapt quickly to changes in marketing campaigns or strategies.

17. Buffer

  • What It Is: Buffer is a social media management tool that allows users to schedule posts, analyze performance, and manage all their social media accounts from a single dashboard. It supports various platforms, including Facebook, Twitter, LinkedIn, Pinterest, and Instagram, making it easier to maintain a consistent presence across the web.
  • Why It’s Important: In affiliate marketing, social media is a vital channel for promoting content, engaging with audiences, and driving traffic to affiliate sites. Buffer streamlines these tasks by allowing marketers to plan and schedule content in advance, ensuring that their social media feeds remain active and engaging without requiring constant attention.
  • How to Use It: Start by linking your social media accounts to Buffer and scheduling your posts across different platforms from the dashboard. Use its analytics features to track the performance of your posts, identifying what works best for your audience. This data can inform your future content strategy, helping to maximize engagement and drive more effective results from your social media efforts.

Integrating Slack and Buffer into your affiliate marketing operations can revolutionize the way you manage projects and maintain your social media presence. By enhancing team communication with Slack and streamlining social media tasks with Buffer, you can improve operational efficiency, ensure consistent engagement with your audience, and ultimately, drive better results from your marketing campaigns.

Conversion Optimization

Conversion Optimization is a critical process in affiliate marketing, focusing on turning visitors into performing actions that benefit the marketer—be it making a purchase, signing up for a newsletter, or clicking on affiliate links. This process often involves tweaking website elements, analyzing user behavior, and employing strategic tools to enhance the effectiveness of these conversions. Let’s delve into the specifics of WpCloaker, Google Analytics, and Visual Website Optimizer, and their roles in optimizing conversions.

18. WpCloaker

  • What It Is: WpCloaker is a WordPress plugin designed to manage and cloak affiliate links. It serves to shorten, beautify, and redirect links while tracking clicks and providing the ability to direct traffic based on certain criteria, such as geographic location.
  • Why It’s Important: Affiliate links can often be long, unwieldy, and obviously promotional, which may deter clicks. WpCloaker makes these links more user-friendly and less obtrusive, potentially increasing click-through rates. Additionally, by cloaking links, affiliates can protect their commissions from being hijacked and provide a cleaner, more professional-looking link to their audience.
  • How to Use It: After installing WpCloaker, affiliates can create cloaked versions of their original affiliate links. These links can then be inserted into content across their site. WpCloaker also allows for the monitoring of link performance, giving insights into which links are generating clicks and conversions, helping to refine affiliate strategies further.

19. Google Analytics

  • What It Is: Google Analytics is a web analytics service offered by Google that tracks and reports website traffic, providing insights into user behavior, traffic sources, and content engagement.
  • Why It’s Important: Understanding how visitors interact with your site is crucial for identifying opportunities to improve conversion rates. Google Analytics offers a wealth of data, from which pages are most popular to how users navigate your site. This information can help identify bottlenecks in the conversion process and areas where the user experience can be improved.
  • How to Use It: Marketers should integrate Google Analytics with their website and regularly review the data it provides. Key metrics to focus on include bounce rate, exit pages, conversion paths, and goal completions (such as form submissions or product purchases). Analyzing this data helps in making informed decisions on content updates, site design changes, and where to place calls-to-action for optimal performance.

20. Visual Website Optimizer (VWO)

  • What It Is: VWO is a platform for conducting A/B testing, multivariate testing, and other experiments on website elements to determine the most effective versions for converting visitors.
  • Why It’s Important: Not all website designs, copy, or calls-to-action perform equally. VWO allows marketers to test different variations of these elements to see which ones lead to the best conversion rates. This data-driven approach removes the guesswork from website optimization, ensuring that changes lead to tangible improvements.
  • How to Use It: To leverage VWO, first identify key elements of your website that you believe could impact conversions—this could be anything from headline text to the color of a “Buy Now” button. Next, create variations of these elements and use VWO to serve these different versions to segments of your website traffic. By analyzing the performance of each variation, you can identify and implement the most effective options, systematically improving your site’s conversion rate.

Through the strategic use of tools like WpCloaker, Google Analytics, and Visual Website Optimizer, affiliate marketers can significantly enhance the efficiency of their conversion optimization efforts. By making affiliate links more appealing, understanding and acting on user behavior data, and empirically testing website changes, marketers can improve their site’s user experience and conversion rate, ultimately leading to increased affiliate revenue.

Conclusion

In conclusion, the landscape of affiliate marketing is both vast and competitive, demanding a strategic approach underpinned by a suite of powerful tools. From niche research and content creation to email marketing, SEO, and beyond, the right resources can significantly elevate the efficiency and effectiveness of your affiliate marketing efforts. Tools like Slack and Buffer exemplify the kind of innovation that empowers marketers to not only streamline their workflow but also to harness the full potential of digital marketing platforms. As we navigate through the complexities of affiliate marketing, embracing these tools isn’t just advisable; it’s essential to staying competitive and achieving sustained success.

Three Key Takeaways:

  1. Leverage Tools for Efficiency and Growth: Whether it’s managing affiliate links, optimizing content for search engines, or coordinating marketing campaigns across teams, the adoption of specialized tools can dramatically enhance productivity. This, in turn, frees up valuable time and resources, allowing marketers to focus on strategy and growth.
  2. Embrace Automation for Competitive Advantage: Tools that offer automation, such as Drip for email marketing or Buffer for social media management, are crucial for maintaining a consistent and compelling presence online. Automation not only ensures operational efficiency but also enables personalized engagement with your audience at scale, a key factor in building relationships and driving conversions.
  3. Stay Agile with Analytics and Optimization: The digital landscape is ever-evolving, making agility a critical attribute of successful affiliate marketing strategies. Utilizing analytics tools like Google Analytics and engaging in regular optimization practices through platforms like Visual Website Optimizer allows marketers to stay responsive to trends, user behavior, and performance metrics. This adaptability is crucial for refining strategies and achieving optimal results.

As affiliate marketing continues to evolve, the integration of these tools and strategies will not only define the effectiveness of marketing efforts but also the overall success of the affiliate business. By focusing on efficiency, automation, and continuous optimization, affiliate marketers can navigate the complexities of the digital world with confidence and achieve their goals.

FAQs

1. What is affiliate marketing?

Affiliate marketing is a performance-based marketing strategy where a business rewards one or more affiliates for each visitor or customer brought by the affiliate’s own marketing efforts. It involves promoting products or services in exchange for a commission on sales or leads.

2. How do I start with affiliate marketing?

To start with affiliate marketing, you should:

  • Choose a niche that interests you.
  • Research and join affiliate programs that offer products or services in your niche.
  • Create content (blog posts, videos, etc.) to promote those products.
  • Share your content on social media, email newsletters, and other platforms to drive traffic.
  • Optimize your content and strategies based on performance analytics.

3. Can affiliate marketing be done without a website?

Yes, affiliate marketing can be done without a website through platforms like social media, email marketing, and video platforms. However, having a website provides a central hub for your content, offers better control over the user experience, and establishes credibility.

4. How do affiliate marketers get paid?

Affiliate marketers can get paid through various methods, including:

  • Pay-per-sale (PPS): Earning a commission for each sale made through your affiliate link.
  • Pay-per-click (PPC): Earning based on the number of clicks generated through your affiliate link.
  • Pay-per-lead (PPL): Earning for each lead generated, such as a sign-up or form submission.

5. What are the best affiliate marketing tools?

Some of the best affiliate marketing tools include:

  • For keyword research and SEO: Ahrefs, SEMRush, Google Keyword Planner.
  • For content creation: WordPress, Grammarly, Canva.
  • For email marketing: Drip, OptinMonster.
  • For analytics and optimization: Google Analytics, Visual Website Optimizer.

6. How long does it take to make money with affiliate marketing?

The time it takes to make money with affiliate marketing varies greatly and depends on factors such as niche, marketing strategies, effort invested, and audience size. Some affiliates see results in a few months, while others may take a year or more to generate significant income.

7. What is the importance of SEO in affiliate marketing?

SEO (Search Engine Optimization) is crucial in affiliate marketing as it helps improve the visibility of your content in search engine results, driving organic traffic to your site or content. This increases the chances of clicks on your affiliate links and potential sales.

8. How can I select the right affiliate products to promote?

Selecting the right affiliate products involves:

  • Choosing products that match your niche and audience interests.
  • Considering the product’s quality, reputation, and customer satisfaction.
  • Evaluating the commission structure and potential earnings.
  • Researching the merchant’s support and marketing materials provided to affiliates.

9. Can I participate in multiple affiliate programs?

Yes, you can participate in multiple affiliate programs to diversify your income sources. However, it’s important to manage them effectively and ensure that the products or services you promote are relevant to your audience and consistent with your niche.

10. What are common challenges in affiliate marketing?

Common challenges in affiliate marketing include:

  • Finding the right niche and products to promote.
  • Building and engaging with an audience.
  • Creating high-quality, compelling content consistently.
  • Navigating competition in popular niches.
  • Keeping up with changes in affiliate programs and marketing strategies.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top
Top 5 Free Keyword Research Tools