Every quarter, agencies get the same brief in different wording: "Can we align with Google's latest Core Web Vitals and Page Experience documentation?" Finding documentation is easy. Converting scattered docs into clear delivery decisions is the hard part. Most teams over-correct in one of two ways. Some treat every page quality recommendation as a direct ranking lever. Others assume Core Web Vitals are old news and stop monitoring them properly. Both positions create avoidable churn in roadmaps and client expectations. This article is a practical read of the Search Central documentation landscape in 2026, built around one question: what should agencies prioritise for search outcomes and user outcomes? We focus on official Google documentation wording, not forum folklore. For metric definitions, use What Are Core Web Vitals? A Practical Guide for 2026 . For implementation workflows, see How to Set Up Automated PageSpeed Monitoring for Multiple Sites .…