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Core Web Vitals

Google’s page-experience metrics

Core Web Vitals · Glossary

What is Core Web Vitals?

Core Web Vitals are Google’s metrics for page experience , how fast a page loads, how quickly it becomes interactive, and how stable it is while loading. They affect both rankings and how many visitors stay.

Page experience , is it fast & stable?GoodPoorLCP , load speedINP , responsivenessCLS , visual stability
Core Web Vitals at a glance

Why it matters. Slow, unstable pages lose visitors and rankings , especially on mobile, where most local searches happen. Passing Core Web Vitals keeps both Google and customers happy.

AI quick answer

Core Web Vitals are Google’s three metrics for real-world page experience: Largest Contentful Paint (loading speed), Interaction to Next Paint (responsiveness to clicks and taps), and Cumulative Layout Shift (visual stability as the page loads). Google measures them from real Chrome users and uses them as a ranking signal, with separate scores for mobile and desktop.

Example: a Winter Park boutique with a slow product page

A Winter Park clothing boutique runs Google Ads to its “new arrivals” page, but the page scores poorly on Core Web Vitals: the hero banner is a giant uncompressed photo, so Largest Contentful Paint takes 4.8 seconds, and a banner ad loads late, shoving the “Add to Cart” button down just as shoppers tap it , a Cumulative Layout Shift problem. After the agency compresses the hero image, reserves a fixed space for the ad slot, and defers non-critical scripts, LCP drops to 1.9 seconds and the layout stops jumping. Bounce rate falls, more ad clicks turn into checkouts, and the same page starts ranking better for “Winter Park women’s boutique” on mobile.

Core Web Vitals matter because Google uses them as a real, if modest, ranking signal, and because they directly shape how many visitors stay long enough to convert. There are three current metrics: Largest Contentful Paint (LCP) measures loading, with “good” at 2.5 seconds or less; Interaction to Next Paint (INP) measures responsiveness, with “good” at 200 milliseconds or less; and Cumulative Layout Shift (CLS) measures visual stability, with “good” at 0.1 or less. INP replaced the older First Input Delay metric in March 2024, so any guide still citing FID is out of date.

A distinction that trips up most small businesses is lab data versus field data. Tools like Lighthouse and PageSpeed Insights simulate a single load in a controlled environment (lab data), but Google actually ranks on field data from the Chrome User Experience Report (CrUX), gathered from real Chrome users over a rolling 28-day window. That is why a page can score 95 in Lighthouse yet still fail Core Web Vitals in Search Console, especially on the mid-range Android phones many Central Florida customers carry. Test on real mobile conditions, not just a fast office laptop on office Wi-Fi.

Common mistakes we see on Orlando-area sites: oversized hero images served at full resolution to phones, third-party review and chat widgets that block interaction, and ad or popup slots with no reserved height that cause layout shift. For local SEO and answer-engine optimization, speed compounds: a fast, stable page earns better mobile rankings, keeps “near me” visitors from bouncing back to the map pack, and is easier for AI assistants to crawl and cite. Core Web Vitals will not outrank strong content and reviews, but they are the technical floor that lets the rest of your SEO work.

Frequently asked

What are the three Core Web Vitals?
The three Core Web Vitals are Largest Contentful Paint (LCP), which measures loading speed; Interaction to Next Paint (INP), which measures responsiveness to clicks and taps; and Cumulative Layout Shift (CLS), which measures how much the page jumps around as it loads. INP replaced First Input Delay in March 2024.
What is a good Core Web Vitals score?
Google’s “good” thresholds are LCP of 2.5 seconds or less, INP of 200 milliseconds or less, and CLS of 0.1 or less. A page needs to pass all three, measured on real-user (field) data, to count as passing Core Web Vitals.
Do Core Web Vitals affect Google rankings?
Yes, but modestly. They are part of Google’s page experience signals and act as a tiebreaker, so they help most when competing pages have similar content. They will not lift weak content, but poor scores can hold back an otherwise strong page, especially on mobile.
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