Website speed & size
How fast a website loads for visitors, how heavy its pages are, and what would make it faster. The test is run by Google PageSpeed Insights.
Reading the result
LCP, when the main content appears, should be under 2.5 seconds. Layout shifting should be under 0.1, so text doesn't jump while you read. A page under 1 to 2 MB loads well on most phones.
The website is loaded on Google's servers, not on your device, so the result does not depend on your own connection.