Skip to content
Back to blog
SEO7 min read

Core Web Vitals explained: how site speed drives SEO and sales

Mira VisionsUpdated May 18, 2026

Google now measures the real experience your visitors get, and it rewards fast, stable, responsive pages. If your Core Web Vitals are poor, you're losing both rankings and revenue.

LCP, how fast the main content appears

Largest Contentful Paint measures how long until the biggest element (usually your hero image or headline) loads. Aim for under 2.5 seconds. Heavy themes and unoptimized images are the usual culprits, custom code fixes both.

INP, how responsive it feels

Interaction to Next Paint measures how quickly the page reacts when someone taps or clicks. Bloated JavaScript from dozens of plugins makes pages feel sluggish, even on fast connections.

CLS, how stable the layout is

Cumulative Layout Shift measures how much the page jumps around as it loads. Those annoying shifts that make you misclick? They hurt conversion and your score. Clean builds reserve space so nothing jumps.

Why it pays off twice

Good Core Web Vitals lift you in search and keep more visitors from bouncing. It's one of the rare improvements that helps SEO and conversion at the same time.

Want a site that passes Core Web Vitals and ranks? We build fast by default. Let's talk.