Core Web Vitals

The first indicator measures when the largest element on screen is painted, usually the main image or heading. The second tracks how long the page takes to respond to the first tap. The third counts how much content shifts during loading, that irritating moment when you go to tap a link and an advert appears under your finger. They are measured on real visitors rather than in a lab, so results move with who is actually visiting.

Why it matters beyond SEO: a slow website loses people before they ever see the offer. On a mobile connection the difference between one second and four is the difference between an enquiry and a closed tab. Google does factor these numbers into rankings, but more importantly every visitor feels them. Speed improvements usually show up in conversions before they show up in positions.

What breaks them in practice: large unoptimised images, too many third party scripts, especially analytics and chat widgets, and fonts that load late and cause text to flash. Fixing it does not need a rebuild: shrink the images, defer scripts that are not needed immediately, and reserve space for elements that arrive later. That is typically two to five developer days.

Where not to overdo it: chasing a green score in a testing tool is not the goal. A site scoring ninety with poor content sells nothing, and no visitor feels the difference between eighty and ninety points. Concentrate on the main content appearing quickly on an ordinary phone with an average connection, not on a perfect number.

We always test on a phone over a normal mobile connection rather than office wifi. The difference is often double, and it is the slower case that decides. Try it today: open your website on a phone with wifi switched off and count the seconds until you see the first meaningful content.