A Google core update is a significant and broad adjustment to the search algorithm that Google uses to rank websites in its search results. These updates are designed to improve the overall quality and relevance of search results by reassessing and reevaluating how various websites are ranked.

• Broad Impact: Core updates have a wide-reaching impact, influencing how various types of content are ranked across different niches.
• Content Relevance: Google aims to improve the relevance of search results by adjusting how it assesses the quality and authority of content.
• Algorithm Tweaks: These updates often involve adjustments to Google's ranking algorithms, considering factors like content quality, user experience, and expertise, authority, and trustworthiness (E-E-A-T).
• Regular Releases: Google releases core updates several times a year. Each update may have specific focuses, but they all contribute to refining the overall search experience.
• Ranking Changes: Websites may experience fluctuations in their search rankings after a core update. Some may see improvements, while others might see a decline.
• Guidance for Webmasters: Google provides guidance for webmasters on how to create high-quality content that aligns with the updated algorithms and guidelines.

It's crucial for website owners and digital marketers to stay informed about these updates and, if necessary, adjust their content and SEO strategies to align with Google's evolving criteria for search result rankings. Following Google's Webmaster Guidelines and focusing on providing valuable, authoritative content can help mitigate the impact of core updates on a website's visibility in search results.The latest Google Core update was launched on October 5, one day after the Spam Update. This was a big surprise for website operators, as Google only completed the last core update in September and also carried out the helpful content update in September, which led to major fluctuations in visibility. The year 2023 is therefore characterized by an increased frequency of Google updates, which require a quick and continuous adaptation of SEO strategies. The roll-out is two weeks. Overall, there are more losers and winners, i.e. fewer pages benefit from the combination of spam and core update. Within domains, fluctuations can even be identified within the subdomains. The losers are again dictionaries and lyrics sites. Song lyric sites are overtaken by the winners YouTube and Spotify. Wikipedia wins over dictionaries. Social media platforms such as Instagram, Facebook and Reddit are also among the winners of the update. Sites ending in .uk appear to be increasingly among the losers.