Technical SEO FAQ · Core Web Vitals, Performance & HTTP
How would you investigate a sudden deterioration in Core Web Vitals?
Establish when the change began.
Then correlate with:
- deployments;
- template changes;
- third-party scripts;
- CDN changes;
- image changes;
- traffic changes;
- device/browser mix.
Compare:
before vs after
and:
affected templates vs unaffected templates.
Use field data to identify whether the deterioration affects real users and lab tools to reproduce the underlying cause.
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