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Google Algorithm Updates & Changes: A Complete History

Below we have compiled a full list of Google algorithm launches, updates, and refreshes that have rolled out over the years, as well as links to resources for SEO professionals who want to understand each of these changes.

Google’s algorithms are a complex system used to retrieve data from its search index and instantly deliver the best possible results for a query. The search engine uses a combination of algorithms and numerous ranking factors to deliver webpages ranked by relevance on its search engine results pages (SERPs).

In its early years, Google only made a handful of updates to its algorithms. Now, Google makes thousands of changes every year.

Most of these updates are so slight that they go completely unnoticed. However, on occasion, the search engine rolls out major algorithmic updates that significantly impact the SERPs such as:

Below, we have compiled a comprehensive list of Google algorithm updates sorted by their release dates.

Google announced the launch of the February 2023 Product Reviews Update, which began on February 21 and was completed on March 18. The update applies to these languages globally: English, Spanish, German, French, Italian, Vietnamese, Indonesian, Russian, Dutch, Portuguese, and Polish. See the Google Search Central Blog to learn more about the product review system.

Google February 2023 Product Reviews Update ⇾

Google Clarifies Product Review Best Practices ⇾

Analyzing The Google February 2023 Product Review Update ⇾

Google announced via the Search Central Blog an update to product review rankings that would enable them to identify high-quality reviews.  The update should take a few weeks to complete.

You can learn more about the quest to provide better product reviews to search users on The Keyword and get Google’s advice on how to write high-quality product reviews.

New Google Algorithm Update Aimed At Product Reviews ⇾

Google announced via the Google Search Central Twitter account that the December 2021 Product Review Update began rolling out for English language pages today, and is estimated to take three weeks to complete. They shared a link to a blog post on product review updates and your website for more information.

Google December 2021 Product Review Update ⇾

Google announced via Twitter a November 2021 Local Search Update that began on November 30th and was completed on December 8th. Google also suggested that businesses review their guidance on how to improve local rankings.

Google Confirms Update To Local Search Results ⇾

According to a tweet from Google Search Liasion, a spam update was rolled out from November 3 – 11, 2021 as a part of their regular work to improve search results. They suggested in their announcement that webmasters should continue following Webmaster Guidelines.

Google Spam Update Done Rolling Out ⇾

Google announced an algorithm update aimed at identifying and nullifying link spam was beginning to roll out. Google warned that any sites taking part in link spam tactics could see ranking changes – with sponsored, guest, and affiliate content most likely to be impacted. Google said the update should be fully rolled out in “at least” two weeks and will impact multiple languages.

Google Link Spam Algorithm Update Rolling Out on July 26 ⇾

Google’s Link Spam Update Is Complete ⇾

Google Search Liaison announced via Twitter that the second part of their spam update has begun on June 28th and will likely be completed on the same day. The original announcement referred to a post on the Google Search Central Blog, updated in April 2021, on how Google fought Search spam in 2020.

Google Announces Spam Update Part 2 ⇾

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