For someone starting out, the best tools are the free ones that Google already provides. Google Search Console shows you how your website appears in search results and which keywords are getting clicks. Google Analytics shows you where your visitors are coming from and how they behave on your site. Beyond those, a free version of a keyword research tool like Ubersuggest or Google Keyword Planner helps you find what people are searching for. These tools give you real data without spending money, which is the right place to start. What do you think is the most useful free tool for someone learning SEO for the first time?