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Message: [QUOTE="Munyaradzi Mafaro, post: 32121, member: 636"] Core Web Vitals in Semrush are part of the Site Audit tool and track how well a website performs in three key areas. It checks how fast the biggest part of the page loads (LCP), how stable the layout feels while loading (CLS), and how responsive the site is when someone first tries to interact. Since First Input Delay (FID) relies on real user actions and can't be tested in a lab, Semrush uses Total Blocking Time (TBT) instead, which closely mirrors how FID works according to Google. [/QUOTE]