Reports in Google Search Console

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Lab data: This means that the analysis uses tools that simulate the loading of a page in a controlled environment.
Field data: This means that the analysis considers real user interactions and captures nuances that the lab doesn't. This is what Google uses in its algorithm.
Therefore:

FID is a metric that can only be measured in the field, as it requires a user to interact with the page. In this case, tools can use another metric (Total Block Time or TBT) to calculate the approximate FID.

LCP and CLS can be measured both in the field and in the laboratory.
Each tool can use a different method and therefore produce different results. That's why it's important to know how each tool works and combine laboratory and field results to have a complete diagnosis. Let's look at this below!

Chrome User Experience Report (CrUX)
The Chrome User Experience Report uses field data to analyze Core Web Vitals metrics, as well as other diagnostic metrics for pages.

You can access Chrome UX Report data in four ways:

CrUX Dashboard , a customizable dashboard for your website in Google Data Studio;
PageSpeed ​​​​Insights , which pulls data from CrUX;
CrUX in BigQuery , which requires SQL knowledge to perform advanced analysis;
CrUX API , to integrate with data from other applications and customize analysis.
PageSpeed ​​​​Insights
PageSpeed ​​Insights is a tool traditionally used by italy phone number list websites to measure page speed . Now, it also reports Core Web Vitals metrics, split between desktop and mobile, as well as suggestions for improvements. It’s available on the web and as an API.

The tool gives us field data from Chrome's User Experience Report. However, it also has lab data and an overall speed score that is based on Lighthouse analysis, another tool we'll look at later.

PageSpeed ​​Insights Core Web Vitals
Google Search Console , an essential tool for any SEO strategy, offers a specific report on Core Web Vitals. It also uses real website usage data.