When was core web vitals introduced?

When was core web vitals introduced?Core Web Vitals were introduced by Google in May 2020 as three specific metrics—Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS)—to measure page experience. They became official ranking signals in June 2021 with the Page Experience Update.AnswerGoogle announced Core Web Vitals in May 2020 as a simplified subset of their existing Web Vitals initiative. The three metrics—LCP (loading speed), FID (interactivity), and CLS (visual stability)—were designed to give site owners clear, measurable targets for page performance instead of forcing everyone to interpret dozens of Lighthouse scores.The rollout as a ranking signal happened gradually. Google started the Page Experience Update in June 2021 for mobile, then extended it to desktop in February 2022. Initially, the impact was modest—maybe 1-3% of queries saw ranking changes directly attributable to Core Web Vitals. Sites with catastrophically bad scores took hits, but marginally improving from orange to green rarely produced dramatic rank jumps on its own.In March 2024, Google replaced FID with Interaction to Next Paint (INP) because FID only measured the first input, missing delayed interactions that happened later in a session. INP captures responsiveness throughout the entire page visit, making it harder to game but more representative of real user frustration. This shift caught a lot of sites off guard, especially those relying on heavy JavaScript frameworks that rendered fast initially but lagged during scrolling or clicking.At Ottawa SEO, we treat Core Web Vitals as table stakes, not magic bullets. A failing CWV score won't kill a strong site with good content and backlinks, but it creates a ceiling—you won't break into top positions if competitors have similar authority and better performance. We prioritize fixes by impact: LCP usually means image optimization and server response time, CLS often comes from ad slots or embeds without defined dimensions, and INP typically requires JavaScript audit and debouncing event handlers. Budgets for CWV work typically run $2,000–$8,000 for an audit plus implementation on a 50–200 page site, depending on tech stack complexity.The key lesson: Core Web Vitals matter, but they're one signal among hundreds. Fix them to remove a penalty, not to replace content strategy or link building.