How fast is your site, really?

What this check actually measures

Google now uses Core Web Vitals as a direct ranking signal, and a mobile visitor decides whether to stay within seconds of your page starting to load. This check loads your live page the way a phone on a real connection would, then reports the same three metrics Google’s own PageSpeed Insights and Search Console use to judge you, translated out of jargon and into what to fix first.

• Largest Contentful Paint (LCP): How long the biggest visible element, usually your hero image or headline, takes to finish loading. Google’s threshold for "good" is 2.5 seconds or under.
• Interaction to Next Paint (INP): How responsive the page feels once someone actually taps or clicks something. Google’s threshold for "good" is 200 milliseconds or under.
• Cumulative Layout Shift (CLS): How much the page jumps around as it finishes loading, the reason people misclick buttons. Google’s threshold for "good" is 0.1 or under.
• Mobile-first measurement: The test runs against the same conditions most of your visitors actually use, not a fast office connection.