The most common SEO tool used by marketers is Google Analytics. This tool provides valuable insights into website traffic and user behavior. You can track which pages attract the most visitors and where your traffic comes from. Google Search Console is another widely used tool. It helps monitor your site's performance in search results and fix indexing issues. Many users rely on Ahrefs or SEMrush for keyword research and backlink analysis. Yoast SEO is a favorite for WordPress users to optimize content. These tools are popular because they are effective, accessible, and help improve search engine rankings.