A core update, in the context of Google Search, refers to a significant change to Google's search algorithms and systems, designed to improve the overall quality and relevance of search results. These updates typically occur several times a year and can substantially impact the ranking and visibility of websites in search results.

Often, Google doesn't release information about the details of its core updates.

YearCore Update NameBrief Explanation
2018“Medic” Core UpdateThis update primarily affected websites in the health and wellness industry, as well as other YMYL sites that could potentially impact a person's well-being or financial stability.
The goal was to improve identification of authority and expertise.
2019September 2019 Core UpdateAnother broad update that aimed to improve the overall quality of search results, with some websites experiencing significant changes in rankings.
2020January 2020 Core UpdateThis update focused on improving the quality and relevance of search results, with some sites in the YMYL (Your Money or Your Life) category being affected.
2020May 2020 Core UpdateA broad update that impacted websites across various industries, aiming to improve the overall quality and relevance of search results.
2020December 2020 Core UpdateThis update focused on improving the quality and relevance of search results, with some sites experiencing significant changes in rankings.
2021June 2021 Core UpdateA broad update that aimed to improve the overall quality and relevance of search results, affecting websites across various industries.
2021July 2021 Core UpdateA continuation of the June 2021 Core Update, further refining the improvements made to the quality and relevance of search results.
2022May 2022 Core UpdateThis update focused on improving the quality and relevance of search results, with some sites experiencing significant changes in rankings.
2022September 2022 Core UpdateCentered on improving search results quality and relevance, resulting in significant ranking changes for some websites.