The document discusses 10 different free online tools that can be used to audit and analyze a website's search engine optimization (SEO) performance. It provides a brief description of each tool, including what aspects of SEO they analyze and what types of reports they produce. The top tools highlighted include Google's Webmaster Tools, HubSpot's Website Grader, SEO Report Card by UpCity, and Woorank. The document aims to help marketers and SEO professionals evaluate and improve their website's search rankings.