Core Web Vitals
Three Google measures of a page: loading speed, response time when tapped, and whether content jumps around.
What are Core Web Vitals, and how do they affect my website?
These are three metrics Google uses to measure the experience of people visiting a page. LCP measures loading: the main content should appear within 2.5 seconds or less. INP measures responsiveness to a tap or click: 200 milliseconds or less. CLS measures visual stability, whether anything jumps around while you read: 0.1 or less.
They are evaluated at the 75th percentile of visits, split between mobile and desktop, so the page has to perform well for most real visits, not just the best ones. INP became one of the three official metrics in 2024.
Why it matters to your business
A slow page, or one that jumps around while it loads, loses people before they read the first line, and it shows even more on mobile. These metrics put a number on that experience, so they help you tell whether a change made the site better or worse.
How we use this at Damorus
In the cases we publish we do not report Core Web Vitals scores; what we do share is how we work on their root causes. On La Roca the homepage picks one random photo and preloads only that one, and fonts load in a deferred way. In URG Technology images get converted to WebP at a maximum of 1,920 pixels, and animations pause once they are off-screen. In The Medspa by Rayray we reserved space from the start for the letter-by-letter headline animation, because it was pushing the page downward as it typed.
Sources
Need this on your project?
I want my free mockup →