PageSpeed Insights
TL;DR
Google's PageSpeed Insights combines lab testing (Lighthouse) and real user data (CrUX) to grade your page 0-100. Aim for 90+ on both mobile and desktop.
Explain Simply
PageSpeed Insights is like a speed test for your website. It tells you how fast your page loads and gives you a report card with specific tips to make it faster.
Google PageSpeed Insights (PSI) is a tool that measures web page loading performance. PSI combines lab data (Lighthouse) and real-world data (CrUX) to evaluate user experience. Score 0-100, with 90+ being good.
PSI provides two types of data: field data (real Chrome users via CrUX — this is what Google uses for rankings) and lab data (Lighthouse simulation — useful for debugging). The Performance score is calculated from 6 Lighthouse metrics: FCP, LCP, TBT, CLS, SI, and TTI (weights vary by version).
Mobile and desktop scores often differ significantly. Mobile simulation uses throttled CPU and 4G network, making scores 20-30 points lower than desktop. Always optimize for mobile first since Google uses mobile-first indexing.
⚡Why It Matters
Page experience has been a Google ranking factor since 2021. Slow pages have 32% higher bounce rate and lower conversion. PSI helps identify performance issues. Pages scoring 90+ on mobile PSI load in under 3 seconds on 4G networks.
🔍How AiSEO Checks
AiSEO integrates directly with Google PageSpeed Insights API, measures Core Web Vitals (LCP, FID, CLS), and provides specific recommendations.
AiSEO Score Impact
Up to 2 points in the Performance category (15% of total score) — based on overall PSI score thresholds
Fix Difficulty
Editor: N/A | Developer: Medium | AI Agent: Medium