Largest Contentful Paint (LCP)
Intermediate PronunciationEN/ˈlɑːrdʒəst ˈkɑːntɛntfəl peɪnt/
LCP measures how long the largest visible element (like the hero image or headline) takes to render from load start — the real speed at which a page “appears”.
It is one of Google’s three Core Web Vitals and directly affects SEO ranking and user experience. Google’s thresholds: good up to 2.5s, needs improvement up to 4s, poor beyond. The most common causes of bad LCP are an unoptimized hero image or slow server response.
FAQ
Per Google’s official threshold, 2.5 seconds or less (at the 75th percentile of visits) counts as good.
Sources:web.dev — LCP