Core Web Vitals · AuditJet Glossary
Lab Data
Core Web Vitals measurements collected in a controlled environment using specified device and network conditions — as opposed to field data from real users.
Lab data is produced by tools like Google Lighthouse, WebPageTest, and AuditJet's synthetic monitoring. It uses fixed device emulation (mid-range Android) and network throttling (4G) to simulate a reproducible test environment. Lab data is ideal for regression detection because conditions are controlled — but it doesn't capture the full distribution of real user experiences.
Related terms
Core Web Vitals measurements collected from real users visiting a website in production — as opposed to lab data from controlled test environments.
An open-source automated auditing tool from Google that measures web page performance, accessibility, SEO, and best practices.
Proactive website monitoring that simulates user journeys from external locations using scripted browser sessions on a scheduled basis.
A public dataset of real user experience data collected by Chrome from opted-in Chrome users across millions of websites.
Frequently asked questions
What is Lab Data?
Core Web Vitals measurements collected in a controlled environment using specified device and network conditions — as opposed to field data from real users.
How does AuditJet measure Lab Data?
AuditJet runs automated Google Lighthouse audits that surface Lab Data scores alongside actionable fix guidance. You can track Lab Data trends across all your pages and receive alerts when the metric regresses.
Monitor Lab continuously
AuditJet tracks Core Web Vitals on a schedule with revenue impact alerts — powered by Google Lighthouse and Google PageSpeed Insights.
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