Google Search Console is Google's free diagnostic and reporting platform for anyone who owns or manages a website. Once you verify ownership, it shows you exactly how Google sees your site: what pages are indexed, what queries people used to find you, how often you appear in results, your average position, and your click-through rate. It also flags technical problems like crawl errors, mobile usability issues, Core Web Vitals failures, and security threats. It works through a verification process—you add a DNS record, upload an HTML file, or use Google Analytics or Tag Manager to prove you control the domain. Once verified, Google starts sharing data from their crawl logs and search analytics. The Performance report shows impressions, clicks, CTR, and position for every query and page over the past 16 months. The Coverage and Indexing reports show which URLs are indexed, which are excluded, and why. The Enhancements section flags structured data errors, AMP issues, and page experience metrics. Search Console also lets you submit sitemaps, request indexing for new or updated pages, and see inbound links Google found. The URL Inspection tool is critical—it shows the exact render and indexing status of any URL, plus the last crawl date and any fetch errors. You can even test a live URL to see if recent changes are crawlable. At Ottawa SEO, we set up Search Console for every client domain and subdomain, monitor it weekly for Coverage drops or manual actions, and use the Performance data to validate our keyword targeting. We particularly rely on the Core Web Vitals report to prioritize technical fixes and the Mobile Usability report to catch responsive design issues before they hurt rankings. If you manage multiple sites, you can add them all under one account with different permission levels for team members. It's the single most important free SEO tool Google offers, and checking it should be part of any site owner's monthly routine.