Google Search Console connects directly to Google's index and shows you what they see when they crawl your domain. You verify ownership through DNS, HTML file upload, or Google Analytics, then GSC starts collecting data about your site's presence in search results. The Performance report shows queries, pages, countries, and devices that generated impressions and clicks over the last 16 months, letting you track ranking changes and CTR patterns. The URL Inspection tool tells you whether a specific page is indexed, when it was last crawled, and what issues prevented indexing if any. Coverage reports flag errors like 404s, server errors, redirect chains, and pages blocked by robots.txt or noindex tags. Core Web Vitals and mobile usability reports surface speed and UX problems that affect rankings. Sitemaps submitted through GSC get crawled faster, and manual actions (penalties) appear here if Google applies them. At Ottawa SEO, we check GSC weekly for clients because it catches indexing drops, manual actions, and Core Web Vitals degradation before traffic tanks. The biggest limitation is that GSC anonymizes queries with low volume, lumping them into (other), which hides long-tail keyword data. Impressions also differ from true search volume because Google counts an impression even if the user never scrolled to your result. GSC data lags 2–3 days, so it's not real-time, and the 16-month retention means you lose historical comparisons unless you export monthly. The tool works best when paired with Google Analytics and a rank tracker, since GSC shows Google's perspective while GA shows user behavior and rank trackers show competitor movement. If you run a 500-domain portfolio like we do, you automate exports via the API to spot patterns across properties, but for most businesses the web interface gives you everything needed to diagnose technical SEO problems and validate content strategy.