Tips for analyzing URLs in Google Page Speed ​​Insights

[samiaseo55]

Confirm that the Core Web Vitals data reported is for the URL , not the origin. This is easily overlooked by less experienced SEOs and developers, causing them to evaluate origin data rather than URL data.
Determine which metrics need improvement and use filters to determine recommendations for metric improvement.
Use a treemap to identify unused code.
URL analysis tips at WebPageTest.org
WebPageTest.org is an invaluable asset for improving overall page speed. Learn how to use WebPageTest.org for Core Web Vitals:

Don't wait until the last minute. All tests are facebook data queued and at the end of the month, and at certain times of day, tests may take some time.
The results view is fantastic. You can see the page visually loading, and below it is a waterfall chart showing what was loading at what time.
Use the Web Vitals page as a key metric to explain the most important issues that need to be addressed.
The Web Vitals view page lets you see where CLS issues are. This is an important indicator, especially for developers, to quickly understand where the problem is.
Further:

Evaluate your Core Web Vitals data and prioritize your attention on URLs with the greatest growth potential.

To get the data you need, you must first access the CrUX API and break it down into meaningful segments for analysis (using shared code/template).

You can then start looking for patterns of issues to analyze that will improve Core Web Vitals metrics across many URLs.