Technical Definition
PageSpeed Insights (PSI) is Google's free tool for analyzing page performance. Provides Core Web Vitals data (field data from CrUX), performance scores (lab data from Lighthouse), and specific optimization recommendations. Essential for diagnosing speed issues. Shows both mobile and desktop scores. Real user data is more important than lab scores.
Simple Explanation (ELI13)
PageSpeed Insights is Google's free tool that tests how fast your website loads. It gives you a score out of 100 and specific suggestions for improvement. It shows real data from actual Chrome users plus simulated tests. Mobile speed is usually more important to focus on than desktop.
Related Terms
Core Web Vitals, Performance, Lighthouse, Page Speed
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