Google PageSpeed Insights measures website performance on a scale from 1 to 100. A score of 85 or higher, means you are in the clear; your website is deemed optimized with sufficient performance. Besides providing your website a grade, Google PageSpeed Insights also shows key statistics, website issues and solutions, and tips on improving your website speed. It also provides clear recommendations on how to optimize your Core Web Vitals. These are, of course, suggestions and recommendations, and not hard facts. GTmetrix provides not only your website’s Google PageSpeed Insights score but also Yahoo’s YSlow score. It also includes optimization recommendations, details on total page load time, page size, and the number of requests.