Google Search Console is a free tool provided by Google that helps website owners monitor, maintain, and troubleshoot their site's presence in Google Search results. It offers insights into how a site performs in search, including information on indexing status, search queries, and user interactions. Webmasters can also use it to submit sitemaps, identify and fix issues affecting search visibility, and improve their site's SEO performance. It's a valuable tool for ensuring a website is accessible and optimized for search engines.