Few Google updates have been trailed as long, or as loudly, as the 2021 page experience update. Google first described it in May 2020, gave site owners about a year's notice, then postponed the launch and rolled it out slowly over the summer of 2021. Along the way, Core Web Vitals went from a developer topic to a boardroom one.
When it finally arrived, the update was far quieter than the build-up suggested. Google had said all along that sites should not expect drastic changes, and page experience remained one of many factors. But the update did change how Google evaluated mobile pages, opened the Top Stories carousel to non-AMP pages and set the stage for later changes.
This guide covers the timeline from announcement to completion, the signals involved, what Google said about impact, what changed afterwards, and how to think about page experience in 2026.
Key Takeaways
- The mobile page experience update began a gradual rollout on 15 June 2021 and was completed around 2 September 2021.
- It added Core Web Vitals (LCP, FID and CLS at the time) to existing page experience considerations: mobile-friendliness, HTTPS and avoiding intrusive interstitials.
- Google said page experience was one of many factors and that sites generally should not expect drastic changes.
- AMP was no longer required for Top Stories eligibility, and Top Stories began using the new signal.
- Since then, page experience came to desktop (February to March 2022), INP replaced FID (March 2024), and Google now says there is no single page experience signal.
The 2021 page experience update at a glance
| Item | Detail |
|---|---|
| Name | Page experience update (mobile) |
| First announced | May 2020 |
| Originally planned | May 2021 |
| Rollout start | 15 June 2021, described by Google as slowly rolling out |
| Expected completion | End of August 2021 |
| Actual completion | Around 2 September 2021, including the Top Stories mobile carousel |
| Type | Page experience ranking signals for mobile results |
| Confirmed by Google? | Yes |
| Expected impact | Small; Google said sites should not expect drastic changes |
From announcement to delayed rollout
Search Engine Land's 2020 review records that Google announced the page experience update in May 2020 and expected it to go live in May 2021, applying to mobile rankings. In 2021 Google postponed the launch, and on 15 June 2021 it said the update was "now slowly rolling out" and would be complete by the end of August 2021. In the end it ran a few days longer: Google confirmed completion around 2 September 2021, with changes to the Google News app following over roughly another week.
The gradual approach was deliberate. A slow rollout meant no single day of dramatic change, which matched Google's message about impact.
“sites generally should not expect drastic changes”
— Google, quoted by Search Engine Land, Google page experience update now slowly rolling out
Which signals were involved
The 2021 update brought Core Web Vitals into Google's page experience considerations alongside signals that already existed. As of 2021, the components were:
| Component (2021) | What it measured | What has changed since |
|---|---|---|
| Largest Contentful Paint (LCP) | Loading performance of the main content | Still a Core Web Vital |
| First Input Delay (FID) | Responsiveness to the first interaction | Replaced by Interaction to Next Paint (INP) in March 2024 |
| Cumulative Layout Shift (CLS) | Visual stability | Still a Core Web Vital |
| Mobile-friendliness | Whether pages work well on mobile | Mobile display still part of Google's self-assessment questions |
| HTTPS | Whether pages are served securely | Still part of Google's page experience guidance |
| No intrusive interstitials | Whether pop-ups block content | Still part of Google's page experience guidance |
| Safe Browsing (report only) | Shown in the Page Experience report | Removed from the report in August 2021; Google said it isn't used as a ranking signal |
The Safe Browsing point is worth noting. TechWyse's coverage quotes Google saying Safe Browsing isn't used as a ranking signal and wouldn't feature in the Page Experience report, which Google simplified on 4 August 2021. For deeper detail on the metrics themselves, see our Core Web Vitals guide.
Who was affected
Google did not publish winners or losers, and the evidence supports the "small impact" message. Search Engine Land's 2021 review quoted Google saying you should not have seen huge ranking changes for this release. The clearest visible change was in Top Stories: Google said AMP was no longer required for eligibility, and the Top Stories mobile carousel was updated as part of the rollout. Publishers that had used AMP mainly for Top Stories gained more flexibility.
Because the rollout overlapped with the June 2021 and July 2021 core updates and two spam updates in late June, large ranking swings in that period are far more likely to reflect those updates than page experience.
What changed afterwards
- Desktop: page experience signals (excluding mobile-friendliness) were extended to desktop results from 22 February to 3 March 2022. See our post on the desktop page experience update.
- INP replaced FID as a Core Web Vital in March 2024.
- No single signal: Google's current documentation says there is no single page experience signal; its core ranking systems look at a variety of signals aligned with overall page experience.
- Relevance still wins: Google says it always seeks to show the most relevant content, even if the page experience is sub-par.
Our post on the page experience signal today covers the current position in detail.
A practical page experience checklist for 2026
Good page experience is worth having for users and conversions, even if its ranking effect is modest. A sensible process:
- Check the Core Web Vitals report in Search Console for mobile and desktop, grouped by URL pattern.
- Prioritise templates with "Poor" URLs that receive meaningful traffic, rather than chasing perfect scores.
- Fix the biggest causes first: slow server response and heavy images for LCP, long JavaScript tasks for INP, unsized media and late-loading ads for CLS.
- Confirm all pages are served over HTTPS and that pages display well on mobile.
- Remove or redesign intrusive interstitials, following our guide on fixing intrusive interstitials.
- Re-measure with field data over the following weeks, and set realistic expectations as covered in page experience fixes and ranking expectations.
Common mistakes
- Expecting big ranking gains from speed alone. Google said page experience was one of many factors.
- Chasing a perfect Lighthouse score. Google's documentation says perfect scores purely for SEO may not be the best use of time.
- Blaming page experience for summer 2021 drops. Two core updates and spam updates overlapped.
- Still optimising for FID. INP has been the responsiveness metric since March 2024.
- Ignoring users. Faster, more stable pages help conversions regardless of rankings.
Where it fits in the timeline
The 2021 update built on earlier user-experience changes such as the mobile-friendly update and the 2018 Speed Update. For the full sequence, see our Google algorithm updates history.
Related Guides
- Google's July 2021 Link Spam Update and Link Qualification Rules
- Google's November 2021 Spam Update Explained
- Google's November 2021 Core Update: A Pre-Holiday Core Update
Frequently Asked Questions
When did the page experience update roll out?
The mobile rollout began on 15 June 2021 and was completed around 2 September 2021.
What signals were part of the 2021 page experience update?
Core Web Vitals (LCP, FID and CLS at the time) plus mobile-friendliness, HTTPS and avoiding intrusive interstitials.
How big was the impact of the page experience update?
Google said sites generally should not expect drastic changes and that page experience was one of many factors.
Did the page experience update apply to desktop?
Not in 2021. A separate desktop rollout ran from 22 February to 3 March 2022.
Is FID still a Core Web Vital?
No. Interaction to Next Paint (INP) replaced FID as a Core Web Vital in March 2024.
Conclusion
The 2021 page experience update was a long-trailed, modest ranking change that nonetheless made speed and stability a mainstream concern. Treat page experience as part of a good product, not a ranking shortcut. If your Core Web Vitals need work, our page speed optimization service can help, or you can request a free quote.
References
- Search Engine Land: Google page experience update now slowly rolling out
- Search Engine Land: Google page experience update is now rolled out
- Search Engine Land: Google algorithm updates 2020 in review
- Search Engine Land: Google algorithm updates 2021 in review
- Google Search Central: Understanding page experience in Google Search results
- TechWyse: Google simplifies the page experience report
