Why difference in LCP data in Page speed Insight and in Search console

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Benu Aggarwal

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Aug 26, 2021, 10:41:04 AMAug 26
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Search console take data from Chrome User Experience and Page Speed Insight also takes Field data from Chrome User experience then this major difference on LCP should not be there.     URL   https://www.hotelnikkosf.com/rooms  this is qualified for core web vitals under Field data in Page speed Insight tool but same URL is showing as Failed in Google search console while both tool takes data from Chrome user experience report.  Why so much different here in this reporting? 

Nikko-User-Experience.png

Let me know if any query. 

Lê Văn Muốn

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Aug 26, 2021, 10:50:26 AMAug 26
to Benu Aggarwal, Chrome UX Report (Discussions)


Vào Th 5, 26 thg 8, 2021 lúc 21:41 Benu Aggarwal <gsitemap....@gmail.com> đã viết:
Search console take data from Chrome User Experience and Page Speed Insight also takes Field data from Chrome User experience then this major difference on LCP should not be there.     URL   https://www.hotelnikkosf.com/rooms  this is qualified for core web vitals under Field data in Page speed Insight tool but same URL is showing as Failed in Google search console while both tool takes data from Chrome user experience report.  Why so much different here in this reporting? 

Nikko-User-Experience.png

Let me know if any query. 

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Rick Viscomi

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Aug 26, 2021, 12:21:21 PMAug 26
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Good question. It's not obvious why a page would be included in a group that "needs improvement" but be individually assessed as having "good" CWV.

I wrote a detailed answer to a similar question recently, I'd encourage you to take a look: https://groups.google.com/a/chromium.org/g/chrome-ux-report/c/PRGtZJvmGkw/m/rzQV99-kCAAJ

In short, Search Console is grouping pages by similarity and reporting on the aggregate quality of experience over the entire group, not individual pages. So the aggregate LCP user experience over all pages in the group is evaluated as "needs improvement". Individually, PageSpeed Insights assesses the page as having a "good" LCP.

According to the Search Console docs: "An issue is assigned to a group of URLs that provide a similar user experience. This is because it is assumed that performance issues in similar pages is probably due to the same underlying problem, such as a common slow-loading feature in the pages."

I'm not sure how you've implemented each page in the "Similar URLs" list and how much they actually share the same features. Perhaps /rooms is being incorrectly grouped with the other pages? Let me know if that's the case and I can pass that feedback along to the appropriate team.


Hope this was helpful.

Rick
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