Google typically makes one or more adjustments to enhance their search results. Most are unnoticeable, but they assist the Google algorithm in incrementally improving in various aspects. In addition to small tweaks, Google also makes significant, broad changes to their search algorithms and systems several times a year. These are known as “core updates.” They are intended to ensure that Google delivers what it promises, their mission of presenting relevant and authoritative content to searchers.
It is very hard to keep track of all of these updates, especially if they have an impact on websites that you may have. This chronological timeline of all of the Google updates and modifications performed for the last 20+ years is here to help ensure that all of the information you need about the Google updates are at your fingertips.