Glossary
Field data
Real-user performance measurements (vs lab data from synthetic tests).
In depth
Field data drives ranking, lab data drives debugging. Google uses CrUX field data for the page-experience signal. Lighthouse provides lab data.
Real-user performance measurements (vs lab data from synthetic tests).
Field data drives ranking, lab data drives debugging. Google uses CrUX field data for the page-experience signal. Lighthouse provides lab data.