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I use the google page insight https://developers.google.com/speed/pagespeed/insights/ to measure the perf metrics about my site. I see the overall score comes out to be based on six web vitals

  1. FCP
  2. SI
  3. LCP
  4. TTI
  5. TBT
  6. CLS

But recently google announce that it will consider below three vitals as core web vitals

  1. FID maps to Interactiveness
  2. LCP maps to Performance
  3. CLS maps to Visual stability

I know google considers performance as one of the ranking factors. My question is does google rank it based on all 6 web vitals or only 3 core web vitals?

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According to the Search announcement in November 2020, only the "Core" Web Vitals will be included in the page experience signal:

  • LCP
  • FID
  • CLS

Graphic showing CWV in the page experience signal

See also the May 2020 announcement: https://developers.google.com/search/blog/2020/05/evaluating-page-experience

We're combining the signals derived from Core Web Vitals with our existing Search signals for page experience, including mobile-friendliness, safe-browsing, HTTPS-security, and intrusive interstitial guidelines, to provide a holistic picture of page experience.

The non-core Web Vitals metrics like SI, TBT, and TTI are diagnostics to help you improve the user-centric CWVs.

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  • With user-centric CWVs you mean LCP/CLS/FID ? I believe you mean non-core Web Vitals metrics like SI, TBT, and TTI will help ultimately to improve core web vitals LCP/CLS/FID. Is it ?
    – emilly
    Jun 6 at 2:19
  • Yes, that's right Jun 6 at 3:16
  • Thanks can you please also help me on webmasters.stackexchange.com/questions/135649/… ?
    – emilly
    Jun 6 at 3:22
  • Sorry, that question is very site-specific and I don't know any more about Search ranking beyond what they post publicly. Jun 6 at 3:45

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