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Core Web Vitals & metrics

Page experience

Page experience is Google’s term for the signals that show how pleasant a page is for visitors. The entry covers the meaning in Google Search.

At a glance

Type
Group of page experience signals, not a single signal
Affects
Google's core ranking systems
Values
Core Web Vitals, HTTPS, mobile usability, ads, interstitials, main content
Since
Announced May 28, 2020, mobile update from June 15, 2021
Status
According to Google, only the Core Web Vitals feed directly into the ranking systems
Docs
Google Search Central: Page Experience

Last checked:

What belongs to page experience?

Google’s documentation lists several aspects: good Core Web Vitals, secure delivery over HTTPS, usability on mobile devices, no excessive ads, no intrusive interstitials, and a clear distinction between main content and other content.

Is page experience a ranking factor?

Google says: “There is no single signal. Our core ranking systems look at a variety of signals that align with overall page experience.” It adds that Search shows the most relevant content even if the page experience is poor, but that for many queries a great page experience can contribute to success. Good Core Web Vitals do not guarantee a top position.

Which Core Web Vitals apply today?

LCP (2.5 seconds), INP (200 milliseconds) and CLS (0.1). web.dev recommends the 75th percentile of page loads, split by mobile and desktop.

Thresholds: LCP, INP, CLS
LCPLargest Contentful Paint
LCP: good up to 2.5 s, needs improvement up to 4 s, above that poor.
INPInteraction to Next Paint
INP: good up to 200 ms, needs improvement up to 500 ms, above that poor.
CLSCumulative Layout Shift
CLS: good up to 0.1, needs improvement up to 0.25, above that poor.

Assessed at the 75th percentile of page loads, mobile and desktop separately. Sources: web.dev: Largest Contentful Paint (LCP); web.dev: Interaction to Next Paint (INP); web.dev: Cumulative Layout Shift (CLS). Last checked: .

Core Web Vitals: from launch to today
  1. Google introduces Web Vitals. The first Core Web Vitals are LCP, FID and CLS.Source: blog.chromium.org
  2. Google announces a page experience ranking signal that combines Core Web Vitals with existing signals.Source: developers.google.com
  3. Google sets the date: the signals are to be used in ranking from May 2021.Source: developers.google.com
  4. Postponed: gradual rollout from mid-June 2021, full effect only by the end of August 2021.Source: developers.google.com
  5. Page experience update for mobile: Core Web Vitals become part of the ranking systems.Source: developers.google.com
  6. Page experience update for desktop, using the same Core Web Vitals thresholds as on mobile.Source: status.search.google.com
  7. INP is no longer experimental. Google announces that INP will replace FID as a Core Web Vital in March 2024.Source: web.dev
  8. INP replaces FID. Since then the Core Web Vitals are LCP, INP and CLS. Articles citing “FID 100 ms” as a threshold are out of date.Source: web.dev
  9. Chrome tools end support for FID.Source: web.dev

End of the mobile rollout: Google says “between June and August 2021”; the often-cited date of September 2, 2021 comes only from a Google Search Central post on X. Last checked: .

Example

A shop is served over HTTPS and has good LCP and CLS values, but a banner covers the content after loading. One aspect of its page experience needs work, and no single score decides the outcome.

Sources

  1. Understanding page experience in Google Search results – Google Search Centraldevelopers.google.com
  2. Web Vitals – web.devweb.dev

Last updated: