When it comes to finding the best free keyword research tool for SEO, one tool that stands out is Google Keyword Planner. This tool is widely used and trusted by SEO professionals for its comprehensive features and accuracy.

Google Keyword Planner allows you to discover relevant keywords for your website or blog by providing search volume data, keyword competition, and suggested bid prices for Google Ads. It also offers keyword suggestions based on your seed keywords or website URL.

For example, let's say you have a website about fitness and you want to find keywords related to "weight loss." By entering this keyword into Google Keyword Planner, you will get a list of related keywords such as "best weight loss programs," "weight loss tips," and "healthy weight loss diets." The tool will also show you the average monthly search volume for each keyword, helping you prioritize your keyword targeting.

Another useful feature of Google Keyword Planner is the ability to filter keywords by location, language, and search network. This allows you to tailor your keyword research specifically to your target audience.

While Google Keyword Planner is a powerful tool, it's important to note that it's primarily designed for Google Ads users. However, you can still benefit from its keyword research capabilities even if you're not running ads.

Aside from Google Keyword Planner, there are other free keyword research tools available such as Keyword Tool and Answer the Public which provide additional insights and suggestions for your keyword research.

In conclusion, if you're looking for the best free keyword research tool for SEO, Google Keyword Planner is a top choice due to its extensive features, accuracy, and integration with Google Ads. However, it's always a good idea to explore multiple tools to get a comprehensive understanding of your target keywords.