Core Web Vitals are speed metrics that are part of Google’s Page Experience signals used to measure user experience. They measure visual load speed, visual stability, and interactivity/responsiveness using the metrics Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and First Input Delay (FID). FID will be replaced by Interaction to Next Paint (INP) in March 2024. The data comes from the Chrome User Experience Report (CrUX) which contains field data of Chrome users who opted to share their data. Mobile page experience and the included What Are Core Web Vital metrics have officially been used for ranking pages since May 2021.

Desktop signals have

Also been used as of February 2022. Cumulative Layout Shift (CLS) measures the visual stability of a page as it loads. It does this by looking at how big elements are and executive data how far they move. Google has already updated how CLS is measured. Previously, it would continue to measure even after the initial page load. But now it’s restricted to a five-second time frame where the most shifting occurs. While a task is running, a page can’t respond to user input. This is the delay that is felt. The longer the task, the longer the delay experienced by the user. The breaks between tasks are the opportunities that the page has to switch to the user input task and respond to what they wanted to do.

What Are Core measure

Core Web Vitals There are many tools you can use for testing and monitoring. Generally, you want to see the actual field data from the Chrome User Experience EF Leads Report (CrUX), which is what you’ll be measured on. This data comes from real users of Chrome who opted to share their data. This dataset is accessible in a number of ways. The numbers that really matter are the page-level numbers that you can only get from the API. These are the numbers Google will use if there’s enough data about a page, otherwise they may use the numbers from a group of similar pages for the scoring or from the whole domain. Every other tool that has page level data will be getting it from this source either directly or indirectly.

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