--- title: "November 2021 core update: dates, what changed and what to do" url: https://seomadman.com/updates/november-2021-core-update section: updates language: en published: 2026-09-26T00:00:00.000Z modified: 2026-09-26T00:00:00.000Z author: Adam Hafez topics: ["Core updates"] --- # November 2021 core update: dates, what changed and what to do ## The short answer Google's November 2021 core update started on 17 November 2021 and finished on 30 November 2021, a 13-day rollout. Google published no site-level figures. Like every core update, it was a broad change to ranking systems rather than a penalty. The December 2021 product reviews update began the next day, on 1 December. ## Key takeaways - The Search Status Dashboard dates the rollout from 17 November 2021 to 30 November 2021. - Google lists the duration as 13 days and published no impact figures for this update. - Google says core updates do not target specific sites or individual web pages. - The December 2021 product reviews update started one day after this rollout finished. - Google's guidance: wait a full week after completion before comparing data. ## What Google changed Google released the November 2021 core update without a separate explanation of what it changed. The [Search Status Dashboard](https://status.search.google.com/incidents/FncPfR7zRSZ3diemah4o) entry says "Released the November 2021 core update." Google describes core updates in general as "significant, broad changes" to its search algorithms and systems, designed to present helpful and reliable results. ## When it rolled out The dashboard records the rollout from 17 November 2021 to 30 November 2021, a total of 13 days, all times US/Pacific. The dashboard did not exist in 2021: the entry and its completion note ("The rollout was complete as of November 30, 2021") were added on 22 March 2023. No other confirmed update overlapped it, but two sat close on either side. The November 2021 spam update finished on 11 November, six days before this one began, and the December 2021 product reviews update started on 1 December, one day after it ended. ## What is known about its impact Google did not publish impact figures for this update. Its core update guidance says these changes "don't target specific sites or individual web pages," and that pages which move down are not necessarily bad; other pages may simply serve the searcher better. Treat any percentage you see attributed to this update as a third-party estimate, and check its method. ## What site owners should do Google's standing core update guidance sets out the steps: - Wait until the rollout has finished, then at least one more full week. - Compare the week after with a week before the update began, not with the rollout window. - A small drop (position 2 to 4) needs no drastic action; a large, sustained drop warrants a site-wide self-assessment against Google's helpful content questions. - Avoid quick fixes. Improve content in ways that help readers; delete content only as a last resort. - Recovery can take months and may not show until a later core update. ## How to check whether it affected you In Search Console, set the Performance report to a range from November to December 2021 and compare clicks for the week before 17 November with the week starting 8 December, a full week after completion. That later week also falls inside the December 2021 product reviews update, so check review pages separately. The [Google Algorithm Updates timeline](/updates) lists every confirmed update with its dates, so you can rule out overlapping rollouts before attributing a change to this one. ## Related updates - The [July 2021 core update](/updates/july-2021-core-update) was the previous core update. - The [November 2021 spam update](/updates/november-2021-spam-update) finished six days before it began. - The [December 2021 product reviews update](/updates/december-2021-product-reviews-update) started the day after it ended. - The [May 2022 core update](/updates/may-2022-core-update) was the next core update. ## Frequently asked questions ### When did the November 2021 core update start and finish? The Google Search Status Dashboard records the start on 17 November 2021 and completion on 30 November 2021, a 13-day rollout. The entry was added to the dashboard on 22 March 2023. ### Did the November 2021 core update penalize specific sites? No. Google says core updates are broad changes that do not target specific sites or individual web pages, and that pages which move down are not necessarily bad; other pages may serve searchers better. ### What should I do if my site dropped during the November 2021 core update? Google's core update guidance is to wait at least a week after the rollout finishes, compare the week after with a week before it began, and only do a deeper content assessment for large, sustained drops. ## Sources 1. [November 2021 core update (incident)](https://status.search.google.com/incidents/FncPfR7zRSZ3diemah4o) - Google Search Status Dashboard (primary) 2. [Google Search's core updates and your website](https://developers.google.com/search/docs/appearance/core-updates) - Google Search Central (primary)