What PageSpeed Insights Measures
PageSpeed Insights scores your page from 0 to 100 based on performance metrics for mobile and desktop, using both lab tests and real-world data. A high score means fast, stable pages — and better SEO and conversions.
Fix the Biggest Problems First
Performance is a chain: one heavy element can sink the whole page. Use the report to find your worst metric, fix it, and re-test. The fixes below cover the most common causes.
Compress and Convert Images
Images are usually the heaviest part of any page. Compress them, serve them in modern formats like WebP or AVIF, and size them to the dimensions they're actually displayed at. A properly optimized hero image can cut load time by half.
Enable Caching
Caching stores parts of your site on the visitor's device or on CDN edge servers, so repeat visits load almost instantly. Check that browser caching and server-side caching are enabled.
Trim JavaScript and Third-Party Scripts
Every tracking script, widget, and plugin adds weight and slows interaction. Keep only what you use, load scripts lazily where possible, and remove anything abandoned. A single heavy analytics script can cost you points.
Use a CDN
A content delivery network serves your files from servers close to each visitor. It's one of the fastest single improvements for global visitors and often built into modern platforms.
Avoid Layout Shift
Reserve space for images and ads, and load fonts with proper settings, so the page doesn't jump while loading. This fixes your CLS score and makes the page feel calmer.
Measure Again
After each fix, re-run the test. Aim for green (90+) on mobile — that's the score Google and users both reward.
The Bottom Line
PageSpeed improvements follow a pattern: heavy images, missing caching, and excess scripts cause most problems. Fix those three, add a CDN, and most sites reach a strong score.