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Core Web Vitals

Core Web Vitals (CWV) is a fundamental set of metrics from Google designed to capture website loading speed and user experience. Let’s explore what metrics it includes, why they matter, and how to measure them.

What Do They Measure?

Core Web Vitals consist of three specific metrics: Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS).

Core Web Vitals Metrics

  • Largest Contentful Paint (LCP) measures the time it takes to load the largest visible element on a page. It answers the question, “How fast does it load?” The threshold for passing is 2.5 seconds.
  • Interaction to Next Paint (INP) measures the time from user interaction to the rendering of a new frame, for all interactions on a page. It answers the question, “How quickly does it respond?” A good response time to a new render is 200 ms.
  • Cumulative Layout Shift (CLS) examines the visual stability of a page during loading and user browsing. It answers the question, “How much does the page jump around?” Google considers a CLS under 0.1 as acceptable.

How to Obtain Metric Values

We must recognize that Core Web Vitals represent data gathered from real users of Google Chrome in the Chrome UX Report dataset. You can find this data in the PageSpeed.ONE tester, PageSpeed Insights, or for URL sets in Google Search Console.

Importance of Metrics

Pages that meet these metrics typically offer a better user experience, which can lead to higher conversions, better search engine rankings, and more cost-effective PPC ads.

Google didn’t choose these metrics and their thresholds at random, but based on extensive work and analysis of numerous studies in human-computer interactions. For these reasons, we regard CWV as crucial benchmarks for optimizing website speed.

Core Web Vitals Dashboard in PageSpeed.ONE Tester

A summary of Core Web Vitals metrics for mobile and desktop can be found in the PageSpeed.ONE tester on your team’s dashboard. Additionally, in the “Summary” report and more. Our tool also allows tracking the evolution of metrics at the domain or URL level over months.

Tracking and Monitoring of Core Web Vitals Metrics in Monitoring PLUS

Authors: Zuzka Šumlanská

Tags:MetricsCore Web VitalsCrUX

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