Loading speed is a Google ranking factor. 53% of users leave a site that takes more than 3 seconds to load.
leave after 3s on mobile
conversions per 100ms saved
Core Web Vitals = SEO factor
Since 2021, Core Web Vitals are officially a Google ranking factor. A slow site loses positions and visitors.
Server response time
The time it takes for the server to send the first byte of the page. Target: less than 200ms.
Excellent
Acceptable
Too slow
Display of the largest element
Time to display the largest visible element (hero image, text block). Target: less than 2.5s.
Good
Needs improvement
Poor
Compression reduces file sizes by 60-80%, significantly speeding up transfer.
Google PageSpeed Insights rates your site from 0 to 100. Realistic targets:
Achievable for most sites
Excellent (50+ acceptable)