Web performance
Website and technology
Website and technology
Web performance is the combination of speed, stability and responsiveness of your site, measured on real visitors and real devices.
Google looks at field data (CrUX) over the past 28 days, not one lab test. A perfect lab score means little if your visitors are on slow connections.
Treat performance as ongoing maintenance. Every new pixel, chat widget or video slider takes something off.
In practice
Improving performance without budget or an owner does not last: within six months the site is full of extra scripts again.
Related terms
- Load timeLoad time is how long before a visitor can see and use your page — not how fast the server responds.
- Core Web VitalsCore Web Vitals are three Google metrics for perceived page speed and stability: LCP, INP and CLS.
- PageSpeedPageSpeed is how fast your page loads and becomes usable. Google PageSpeed Insights scores it from 0 to 100 and lists concrete improvements.
- HostingHosting is where your website's files and database run and from where they are served to visitors.