Low mobile Lighthouse performance score
High priorityPerformance
Google Lighthouse scores the page under 90 for performance on a simulated mid-range phone.
What triggers this issue
- Score 50–89 (needs improvement).
- Score under 50 (poor).
Why it matters
Lighthouse loads your page on a throttled mobile connection and combines several speed metrics into one score. It’s a lab test, so it varies run to run, but a low score reliably points to the same problems real visitors on slower phones experience.
How to fix it
- Work through the specific Lighthouse opportunities in your report, biggest savings first.
- The usual wins: smaller images, less JavaScript, fewer third-party tags, caching and a CDN.