Core Web Vitals: the speed signals that quietly decide your rankings

Speed isn’t just a better experience — it’s a ranking signal and a conversion lever. Google measures it through three Core Web Vitals, and most sites are quietly losing traffic to all three without realising it.

LCP — Largest Contentful Paint

LCP measures how long until your main content appears. Aim for under 2.5 seconds. The usual culprits are oversized hero images, render-blocking scripts and slow servers. Fixes: compress and correctly size images, preload the hero asset, and serve fast HTML from the edge.

CLS — Cumulative Layout Shift

CLS measures visual stability — how much the page jumps around as it loads. Aim for under 0.1. Shifts come from images without dimensions, late-loading fonts and injected banners. Fixes: set explicit width and height on media, reserve space for embeds, and load fonts without a reflow.

INP — Interaction to Next Paint

INP replaced First Input Delay and measures responsiveness — how quickly the page reacts when someone taps or clicks. Aim for under 200 milliseconds. The enemy is heavy JavaScript blocking the main thread. Fixes: ship less script, break up long tasks, and defer work that isn’t needed immediately.

Why this pays off twice

Better vitals lift rankings and revenue. Faster, more stable pages convert more visitors into customers — so the same fixes that please Google also grow your pipeline. It’s one of the rare places where the user’s interest and the algorithm’s are perfectly aligned.

How to know where you stand

Field data (from real visitors) matters more than lab tests. Tools like Google’s Search Console and PageSpeed Insights report your real-world vitals, but they won’t tell you which fix to do first.

That’s what our free SEO audit is for — it scores your vitals alongside the rest of your on-page and technical SEO, and tells you what to tackle first.