Core Web Vitals

PageReflect includes a mobile Lighthouse lab run for each page it audits. When it succeeds, LCP, CLS, and interactivity signals (INP where available, otherwise TBT as a lab proxy) appear in your report and feed the performance narrative.

Because an audit covers several pages, you are looking at vitals captured across the site, not a single URL. Lab data is a controlled snapshot, not a guarantee of what every visitor experiences.

Google's Core Web Vitals thresholds (Good, Needs Improvement, Poor) are the basis for our performance bands. Each lab metric is colored against the same thresholds Lighthouse uses, so a number that is amber here is amber in Lighthouse too.

When lab numbers consistently land in the Good band, validate against real users via the Chrome UX Report or your analytics. Lab data is a fast forcing function; field data is the truth. See Lab data and Field data.