Web Vitals

Web Vitals shows how fast your site is for real visitors, from the field data Google publishes about real Chrome users, alongside a lab test of the homepage. It needs no connection: it works from your website's address.

What it shows

Pick a device (all devices, phones or desktop) to see the 75th percentile of:

• LCP, Largest Contentful Paint: how long the main content takes to appear.
• INP, Interaction to Next Paint: how quickly the page responds to input.
• CLS, Cumulative Layout Shift: how much the layout jumps while loading.
• FCP, First Contentful Paint, and TTFB, Time to First Byte.

Each is rated against Google's published thresholds for good and poor:

The field data covers a rolling 28-day window, and RankDebug keeps the history so you can see a metric change over time.

Homepage Lab Score is a mobile lab test of the homepage, run with each site check. A drop of 15 points or more between checks is reported as Performance Dropped.

By page type

By Page Type groups your busiest pages by their first path segment, so /cars/golf-7 belongs to /cars/*. The pages are chosen by Search Console clicks over the last 28 days. For each type it shows the median across its measured pages now and four windows earlier, so a template that got slower stands out.

Field data only exists for pages with enough Chrome visits. Pages with too few are skipped, and a site with too little traffic shows No real-visitor data yet.