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GullySystem

Core Web Vitals

Core Web Vitals are three measures Google collects from real visitors: load time of main content, response to a tap and layout movement. Work here targets all three.

What each measure describes

The names are unhelpful. Each one describes something ordinary and has a usual cause.

Largest contentful paint

When the main image or heading appears. It is usually held up by an oversized hero image or a slow server.

Interaction to next paint

How long a tap takes to do something visible. Heavy scripts are the common cause.

Cumulative layout shift

How far the page jumps while loading, which leads people to tap the wrong thing.

Field data over lab scores

A tool run from a fast connection gives a tidy number. Google grades a site on what real visitors experienced over the past month.

Real visitors first

Field measurement comes from your own traffic, split by device class and connection.

Lab tests for diagnosis

Lighthouse and DevTools traces find causes. They are not the score that counts.

Page types, not one page

A category listing, a product page and the checkout behave differently, and each is measured on its own.

What fixing them is worth

Expectations are set before the work and not after it.

One signal among several

Content and relevance carry most of the weight in search. Vitals are one signal beside them.

The practical gain

Fewer abandoned visits on a phone, which shows in your own analytics before it shows in search.

Time to register

Field data updates over a rolling window, so improvements appear in the report gradually.

FAQ

Frequently asked questions

Will passing Core Web Vitals improve our search ranking?

It can help, usually as a tie-breaker between pages of similar relevance. Nobody can promise a jump in ranking from vitals alone, and this work does not.

Our score is red on mobile and green on desktop. Why?

Mobile testing uses a slower device and connection, which exposes heavy images and scripts that desktop hides. Mobile is often the larger share of visits, so its grade is read first.

Can vitals be fixed on a WordPress or Shopify site?

Yes, within the limits of the platform. Themes, plugins and apps are usually where the weight sits, and trimming them is most of the work before any code is touched.

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