Google’s John Mueller pointed out an important fact that I have seen many people in the industry misunderstand core network elements. Googlebot does crawl the web and introduces most of the signals that Google uses to rank your pages, but the core network elements do not come from Googlebot or crawling, but from Chrome CRuX field data reports.
In other words, Google uses actual Chrome usage data to bring in data around the core network elements of a particular page. These include LCP, FID and CLS scores. Googlebot crawling is not the source from which Google obtains this data. Chrome is used by people who visit your website through the Chrome browser, and Google gets its data from there.
You can learn more about Chrome user experience report There if you want.
This is John’s tweet:
Googlebot does not evaluate core network elements-we use field data to evaluate. In addition, we do not use it yet-it is planned to be used in the future.
-🍌John (@JohnMu) April 16, 2021
In addition, just because it is called the “core” network life cycle does not mean that this is a core update. They are two very different things.
Forum discussion Twitter.