Sitewatch checks whether your website actually works — not just whether it responds. Sites can return 200 OK while serving broken bundles, wrong MIME types, redirect loops, or stale cached content. Users see a blank page. Your uptime tool says green. Sitewatch verifies critical assets load correctly, follows redirect chains, fingerprints content to detect silent changes, and checks from multiple regions. When something breaks, it classifies the root cause with fix guidance for your stack.