Google Buzz was a social networking, microblogging and messaging tool that was developed by Google and integrated into their web-based email program, Gmail. Users could share links, photos, videos, status messages and comments organized in "conversations" and visible in the user's inbox.

On October 14, 2011, Google announced that it would be discontinuing the service and that the existing content would be available in read-only mode. Buzz was discontinued on December 15, 2011.

Buzz enabled users to choose to share publicly with the world or privately to a group of friends each time they posted.Picasa, Flickr, Google Latitude, Google Reader, Google Sidewiki, YouTube, Blogger, FriendFeed, identi.ca and Twitter were integrated. The creation of Buzz was seen by industry analysts as an attempt by Google to compete with social networking websites like Facebook and microblogging services like Twitter. Buzz also included several interface and interaction elements from other Google products (e.g. Google Reader) such as the ability to "like" a post.