The best keyword research tool for you will depend on your specific needs. If you are looking for a tool to estimate the search volume and competition for keywords, then Google Keyword Planner is a good option. If you are looking for a tool to identify the keywords that your website is ranking for, then Google Search Console is a good option. If you are looking for a more comprehensive keyword research tool, then you may want to consider a third-party tool like Semrush, Ahrefs, Moz, KWFinder, or Long Tail Pro. These tools offer a variety of features that can help you to find the right keywords for your website.