Google Algorithm Updates: A 5-Year Timeline (2021 to 2026)
Every major confirmed Google update from late 2021 to today, what each one targeted, and what five years of core and spam updates mean for your SEO now.
The short answer: Over the last five years Google has settled into a steady rhythm: three or four core updates a year, regular spam updates, and a long campaign against thin, unhelpful and mass-produced content. Since 2024, “helpful content” is no longer a separate system but part of how Google ranks everything, and AI Overviews and AI Mode have changed what a click is worth. The sites that keep winning publish genuinely useful, first-hand content and don’t chase tricks.
Every few months a Google update lands, rankings wobble and the SEO world panics. Most business owners only hear about an update when their traffic drops. So here’s the full picture: every major confirmed update from late 2021 to today, what each one was aimed at, and what the pattern tells you about where search is heading.
Dates come from Google’s own Search Status Dashboard and Google Search Central announcements.
First, the three types of update
- Core updates are broad changes to how Google judges quality across the whole web. They don’t target a single site. They re-score everyone, and usually take two to three weeks to roll out.
- Spam updates improve how Google detects sites breaking its spam policies, from link schemes to mass-produced pages. Much of this work is done by SpamBrain, Google’s AI-based spam system.
- Targeted updates focus on one problem, such as product reviews, helpful content or page experience. Since 2024, most of these have been folded into core updates.
Late 2021: reviews and page experience
Earlier in 2021, the page experience update made Core Web Vitals a ranking signal on mobile. The back end of the year focused on quality and reviews.
| When | Update | What it did |
|---|---|---|
| Nov 2021 | November 2021 spam update | A spam clean-up, days before the core update. |
| 17 to 30 Nov 2021 | November 2021 core update | A broad quality re-score, right before the holiday shopping season. |
| Dec 2021 | December 2021 product reviews update | Rewarded in-depth, first-hand reviews over thin summaries. |
2022: the helpful content system arrives
| When | Update | What it did |
|---|---|---|
| Feb to Mar 2022 | Page experience update (desktop) | Brought Core Web Vitals signals to desktop results. |
| Mar 2022 | March 2022 product reviews update | More weight on genuine testing and expertise in reviews. |
| 25 May to 9 Jun 2022 | May 2022 core update | Broad quality re-score. |
| Jul 2022 | July 2022 product reviews update | Another round for review content. |
| 25 Aug to 9 Sep 2022 | Helpful content update | A new site-wide signal that demoted content written mainly for search engines instead of people. |
| 12 to 26 Sep 2022 | September 2022 core update | Broad quality re-score. |
| Oct 2022 | October 2022 spam update | Improved spam detection. |
| Dec 2022 | December 2022 helpful content update | Expanded the helpful content system to all languages. |
| Dec 2022 | December 2022 link spam update | Used SpamBrain to neutralise unnatural links, including bought links. |
2023: the core update treadmill
| When | Update | What it did |
|---|---|---|
| Feb 2023 | February 2023 product reviews update | Expanded reviews signals to more languages. |
| 15 to 28 Mar 2023 | March 2023 core update | Broad quality re-score. |
| Apr 2023 | April 2023 reviews update | Widened from product reviews to reviews of services, businesses and more. |
| 22 Aug to 7 Sep 2023 | August 2023 core update | Broad quality re-score. |
| 14 to 28 Sep 2023 | September 2023 helpful content update | Hit many independent publishers and affiliate sites hard. |
| Oct 2023 | October 2023 core and spam updates | Two updates rolling out at the same time. |
| Nov 2023 | November 2023 core and reviews updates | Google said future reviews improvements would roll out without separate announcements. |
2024: the biggest shake-up in years
| When | Update | What it did |
|---|---|---|
| 5 Mar to 19 Apr 2024 | March 2024 core update | A 45-day rollout, the longest on record. Folded the helpful content system into core ranking, with Google expecting to cut low-quality, unoriginal results by around 40%. |
| Mar 2024 | March 2024 spam update and new spam policies | Introduced policies on scaled content abuse, site reputation abuse and expired domain abuse. |
| May 2024 | AI Overviews launch in the US | AI-written answers began appearing above the traditional results. |
| Jun 2024 | June 2024 spam update | Improved spam detection. |
| 15 Aug to 3 Sep 2024 | August 2024 core update | Aimed to show more genuinely useful content, including from smaller sites. |
| Oct 2024 | AI Overviews expand internationally | Rolled out to more than 100 countries. |
| 11 Nov to 5 Dec 2024 | November 2024 core update | Broad quality re-score. |
| 12 to 18 Dec 2024 | December 2024 core update | One of the fastest core rollouts ever, at six days. |
| 19 to 26 Dec 2024 | December 2024 spam update | Improved spam detection. |
2025: AI Mode and continuous updates
| When | Update | What it did |
|---|---|---|
| 13 to 27 Mar 2025 | March 2025 core update | Broad quality re-score. |
| May 2025 | AI Mode launches in the US | A full conversational search experience inside Google. |
| 30 Jun to 17 Jul 2025 | June 2025 core update | Broad quality re-score. |
| 26 Aug to 22 Sep 2025 | August 2025 spam update | A month-long global rollout. |
| 11 to 29 Dec 2025 | December 2025 core update | Google also updated its documentation to confirm that smaller core updates now happen on an ongoing basis. |
2026 so far: faster and more frequent
| When | Update | What it did |
|---|---|---|
| 5 to 27 Feb 2026 | February 2026 Discover core update | The first core update aimed only at Discover, starting with English-language users in the US. |
| 24 to 25 Mar 2026 | March 2026 spam update | Finished in under 20 hours. |
| 27 Mar to 8 Apr 2026 | March 2026 core update | Widely reported as one of the most volatile core updates yet. |
| 21 May to 2 Jun 2026 | May 2026 core update | The second core update of the year, with no new guidance from Google. |
| May 2026 | Spam policies extended to AI answers | Google clarified that trying to manipulate its generative AI responses breaches its spam policies. |
| Jun 2026 | June 2026 spam update | Rolled out in about two days. |
| 18 to 21 Aug 2026 | August 2026 spam update | A short global rollout with no new policy categories. |
| From 24 Sep 2026 | September 2026 spam update | Rolling out now. Google says it may take up to two weeks. |
What five years of updates tell us
- Helpfulness is the whole game. Since March 2024, helpful content isn’t a separate filter. It is baked into how Google ranks every page.
- Scale without quality gets punished. Mass-produced pages, whether written by people or AI, now fall under the scaled content abuse policy.
- Stop chasing individual updates. Google now runs smaller core updates continuously. Building a site that deserves to rank beats reacting to every rollout.
- AI answers change the value of a ranking. With AI Overviews and AI Mode, a top position is worth less than it was. We unpack that in why ranking first on Google matters less.
- First-hand experience is hard to fake. Real results, real photos, named authors and genuine expertise keep coming out ahead.
What to do when an update hits your site
- Wait for the rollout to finish. Rankings bounce around during an update. Judge the result once Google marks it complete.
- Compare like with like. In Search Console, compare the two weeks after the rollout with the two weeks before it.
- Find the pattern. Is the drop site-wide, or limited to certain pages or topics? That tells you where to look.
- Separate spam from core. A spam update drop usually points to a policy problem. A core update drop points to content quality and usefulness.
- Improve, don’t panic-delete. Make your weakest pages genuinely better. Recovery often shows up at the next core update, not the next day.
How to update-proof your SEO
The businesses that ride out update after update do the same few things: they answer real customer questions clearly, show first-hand proof, keep their sites fast and tidy, and earn mentions from sources people trust. It is less exciting than chasing the latest trick, but it works every time.
If an update has hit you, or you want to make sure the next one doesn’t, that is exactly what our SEO and AI search optimisation work is built for. We’re the digital agency Perth businesses call when rankings drop. Start with a free audit and we’ll show you where you stand.
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About the author
Director and Lead Consultant, Anahaw Media
John Conigliaro is the Director and Lead Consultant at Anahaw Media, a Perth digital marketing agency focused on performance. A Filipino-Australian digital marketer now based in Perth, WA, with more than 15 years’ experience across Singapore and Australia, he has led agencies in Australia on technical execution and growth strategy, founded a globally recognised eCommerce brand, and managed almost 300 campaigns, from small businesses to multinational brands, including Canon, Uniqlo, Benefit Cosmetics, Asiana Airlines, Changi Recommends, APM and Golfbox. He completed an MBA and a dissertation on Digital Transformation, holds a specialisation in Computer Applications from De La Salle-College of Saint Benilde (DLSU-CSB), and is also a consumer tech critic and publisher. His mission is to use his talent and passion for digital marketing to change businesses for the better, in how they win customers and how they build their brand.
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