What Are Core Web Vitals?

What Are Core Web Vitals?

There are three Core Web Vitals that Google is encouraging all website owners to keep track of and improve in order to serve a better user experience. It’s already been confirmed that these will become a ranking factor in search.

They are:

Largest Contentful Paint (LCP)
a metric that tracks loading speed.

Cumulative layout  Shift (CLS)
a metric that tracks visual stability on the page.

First Input Delay (FID)
a metric that tracks the time it takes before someone interacts with the page.

Each metric covers a different aspect of user experience and is impacted by different factors.

LCP is hurt by:
• Slow server response time
• Java and CSS that blocks rendering
• Slow loading resources (especially image and video files)
• Client-side rendering

FID is hurt by:
• Long tasks
• Long JavaScript execution time
• Large JavaScript bundles
• Render-blocking JavaScript

CLS is hurt by:
• Ads causing any change in layout Cookie banners/notices
• Images without dimensions
• Dynamically injected content
• Embeds and iframes without dimensions
• Web fonts causing FOIT/FOUT

As a web agency specialized in Google Page Experience and SEO implementation, Pimclick can help you to improve your SEO and SERP.


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