What is a Google Core Update?

Each core update tweaks Google’s ranking formula and can affect many websites. Pages that rank high for specific keywords may rank lower after a core update.

Core algorithm updates are typically made every few months. Google usually announces upcoming updates in advance and describes their goals.

Core updates are different from minor updates. A minor update may affect a small percentage of search results, while a core update can affect many more search results.

Furthermore, core updates may take several weeks to roll out. On the other hand, minor updates are sometimes done daily.