The claim
Core Web Vitals provide a standardised, field-measured assessment of user experience that Google uses as a ranking-relevant signal, particularly as a tie-breaker.
What the evidence shows
Google's page experience documentation defines Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift with specific 'good' thresholds, measured from real Chrome user data (CrUX). Google frames these as signals that help rank comparable-quality pages, while stressing that great content still outranks a fast but unhelpful page.