Google: Algorithm Updates

Google has a long history of famous algorithm updates, search index changes and refreshes.

Below are links to some of the most important resources for search marketers:

1. Google Hummingbird
2. Google Mobile Friendly Update
3. Google Panda Update
4. Google Penguin Update
5. Google Pigeon Update
6. Google Payday Update
7. Google Pirate Update
8. Google EMD (Exact Match Domain) Update
9. Google Top Heavy Update

For More details: https://searchengineland.com/library/google/google-algorithm-updates