Why fast web apps win: Core Web Vitals explained

A slow website costs you twice: lower Google rankings and fewer conversions. Core Web Vitals are how Google measures that speed, and how you should too.

The three metrics

• LCP (Largest Contentful Paint) measures loading. Aim for under 2.5 seconds. It is usually your hero image or main heading.
• CLS (Cumulative Layout Shift) measures visual stability. Aim for under 0.1. It punishes content that jumps around as the page loads.
• INP (Interaction to Next Paint) measures responsiveness. Aim for under 200 milliseconds. It captures how quickly the page reacts when a user taps or clicks.

Why they matter

Google uses these signals in ranking, and users vote with their patience: faster pages convert better and bounce less. Speed is not a nice to have, it is revenue.

How we build for them

Compressed, correctly sized images (WebP, with width and height set), code splitting so browsers download less up front, caching and a CDN, and restraint with heavy scripts. We treat performance as a feature from the first commit, not a cleanup task at the end.

Building or rebuilding a site? Our web app development service ships fast, SEO ready web apps by default.