Google PageSpeed Insights vs. Core Web Vitals Extension for Performance
Summary
The transparency helped developers and marketers know where to make improvements on their site; the Diagnostics section of the tool would break down things like requests, render-blocking resources, whether the CSS and JavaScript was minified, and more. PageSpeed Insights tool has long offered a helpful baseline, but it consistently fails to provide a true user experience score because the data is lab generated. To address this concern, Google recently released Core Web Vitals, a tool that provides specific details on your site’s real-life speed and experience. Sites went a bit overboard trying to game their FCP measurement, but luckily some have realized that its not helpful to show placeholder loading UI if doing so delays the arrival of the actual content. The easiest ways, however, are to either look in Google Search Console under Enhancements > Core Web Vitals or in a PageSpeed Insights report under the “Field Data” section.