Core Web Vitals Explained for Non-Technical Owners
Plain-English guide to LCP, INP, and CLS: what each measures, what “good†means, and the practical fixes for each metric.
Core Web Vitals measure how fast, responsive, and stable your pages feel to real users. They are ranking inputs — but more importantly, they describe actual visitor experience.
LCP: Loading Speed
Largest Contentful Paint measures when the main visible content appears — target under 2.5 seconds. Usual culprits: giant hero images, slow server response, and unoptimized fonts. Compress the largest image and preloading it often fixes LCP alone.
INP: Responsiveness
Interaction to Next Paint measures how quickly the page reacts to clicks and taps — target under 200 ms. Heavy JavaScript and long-running tasks cause lag; deferring third-party scripts is the common remedy.
CLS: Visual Stability
Cumulative Layout Shift scores unexpected jumping — target under 0.1. Fixed dimensions on images, reserved ad slots, and loading content without placeholders prevent the most annoying shifts.
Frequently Asked Questions
Where do I see my real scores?
Search Console’s Core Web Vitals report shows field data for your actual visitors.
Do good vitals guarantee page one?
They are one ranking factor among many — but poor scores actively hurt.
How long do fixes take to show?
Field data updates in rolling windows — expect two to four weeks after fixes go live.
Open the Core Web Vitals report, fix the worst-performing template first, and watch the field data turn green.