Google Search Console is the only SEO tool that provides data sourced directly from Google's crawling and indexing infrastructure — every other SEO platform estimates rankings, impressions, and crawl issues by inference. GSC's URL Inspection tool can confirm exactly how Google's crawler sees any page, identify structured data errors before they affect rich results, and reveal when a page was last crawled. The Core Web Vitals report, which uses real Chrome user experience data rather than synthetic lab tests, provides the most accurate performance baseline for technical SEO improvements. For any website owner, GSC is non-negotiable regardless of which paid SEO tool they use.