Loading time is revenue: what Core Web Vitals really mean

Since 2020 Google has rated not only what is on a page but how it feels. Three metrics sum that up. They sound technical but mean very everyday things.

LCP: when is the most important thing visible?

Largest Contentful Paint measures when the largest visible content is in place – usually the main image or the headline. Under 2.5 seconds counts as good. The most common brake is an image that is too big. Modern formats, correct sizes and an early loading hint solve that in most cases.

INP: how quickly does the page respond?

Interaction to Next Paint replaced the old FID value in 2024 and measures how long it takes after a click for something to happen. Under 200 milliseconds is good. Poor values almost always come from too much script executed on load – trackers, chat windows, fonts from external sources.

CLS: does the layout jump?

Cumulative Layout Shift measures how much content shifts while loading. Anyone who has ever clicked in the wrong place because an ad loaded late knows the problem. The solution is banal: reserve fixed sizes for images and ad spaces.

What that brings in practice

One second less loading time changes bounce rate and completed orders measurably. We deliver websites with pre-rendered pages, load images at the right size and embed no external scripts without knowing the price of them. That is not magic but craft.

What we do on every project

What you can check yourself

Google provides two tools: PageSpeed Insights for a single measurement and Search Console for the real values of your own visitors over 28 days. The second one counts, because it measures real devices and connections, not a data centre.

The look at the phone matters. Over half of visits come via mobile, often over cellular. A page that stands in one second on the office computer can take five on the move.

The link to revenue

Studies by large retailers have shown the same pattern for years: every additional second of loading time costs orders in the double-digit percentage range. For a small shop with a hundred orders a month that is not an academic topic but the difference between ten and twelve orders a week.