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:

• Google Hummingbird
• Google Mobile Friendly Update
• Google Panda Update
• Google Penguin Update
• Google Pigeon Update
• Google Payday Update
• Google Pirate Update
• Google EMD (Exact Match Domain) Update
• Google Top Heavy Update