Sometimes, an update may be more noticeable. We aim to confirm such updates when we feel there is actionable information that webmasters, content producers or others might take in relation to them. For example, when our “Speed Update” happened, we gave months of advanced notice and advice.
Several times a year, we make significant, broad changes to our search algorithms and systems. We refer to these as “core updates.” They’re designed to ensure that overall, we’re delivering on our mission to present relevant and authoritative content to searchers. These core updates may also affect Google Discover.
We confirm broad core updates because they typically produce some widely notable effects. Some sites may note drops or gains during them. We know those with sites that experience drops will be looking for a fix, and we want to ensure they don’t try to fix the wrong things. Moreover, there might not be anything to fix at all.
Core updates & reassessing content
There’s nothing wrong with pages that may perform less well in a core update. They haven’t violated our webmaster guidelines nor been subjected to a manual or algorithmic action, as can happen to pages that do violate those guidelines. In fact, there’s nothing in a core update that targets specific pages or sites. Instead, the changes are about improving how our systems assess content overall. These changes may cause some pages that were previously under-rewarded to do better.One way to think of how a core update operates is to imagine you made a list of the top 100 movies in 2015. A few years later in 2019, you refresh the