PageSpeed Insights is a free tool that Google offers to website operators. It automatically analyses your website, focusing on page load time.
This article will look at how reliable PageSpeed Insights data is and what role it plays for SEO.
Lab-based performance tests often give different results from data that's collected from real users. This article explains the differences between these two ways to measure site speed and how they lead to different test results.
We'll focus on Lighthouse and the Chrome User Experience report, but note that there are many other ways to collect lab or field data.
When running page speed tests using different tools you'll often find that the metrics they report don't match up exactly, or may even show significant discrepancies.
This article explains why you might see score and metric differences between PageSpeed Insights, Lighthouse, and other tools.