The Chrome User Experience Report was released in October 2017.
It was introduced as a public collection of web user experience metrics, including performance data aggregated from Chrome users who had opted-in to syncing their browsing history and had used statistic reporting enabled in the report. This essentially means that Google has been using Chrome to collect performance data in order to analyze site speeds.
If you choose to opt-in as a Chrome user, you are essentially allowing your browser to provide Google load time metrics. The Chrome User Experience Report examines over a million of the most popular websites on the internet. It's likely that it now contains information from other domains that are part of this public data set.
The Google Web Rendering Service was not used to measure site speed, according to Google. Other data sources are used by Google to determine site speed. This is due to the fact that the report's data set does not include all domains. These data sources, on the other hand, were. In addition, data from the Chrome User Experience has now been included to Google's PageSpeed Insights service.
What exactly does this imply?
In short, we don't know exactly how Google measures site speed. There are a few aspects that haven't been disclosed, but we do know that Google measures it for the most popular domains using Chrome. Overall, to increase SEO experience in chrome. So, at this point, you're probably thinking how you might make adjustments to your website to improve its speed. We already know that Google notices modifications to your website that even Googlebot misses. So, if you deploy HTTP/2 for your users, Google will still be able to discover speed improvements using Chrome User Experience Reports, for example.