Yahoo Messenger, which began as "Yahoo! Pager" in 1998 and officially shut down in 2018, holds a legendary status in internet history as one of the "big three" instant messengers of the 2000s alongside AIM and MSN

: An attention-grabbing feature that made the recipient's entire chat window shake.

What made Yahoo Messenger stand out from its early competitors was not just the ability to send text, but a suite of innovative features that felt magical at the time:

For millions of early internet users in the late 1990s and 2000s, logging into Yahoo Messenger was as routine as checking your email. It was the digital living room where friendships were forged, romances bloomed, and office gossip spread at the speed of a dial-up connection.

The Rise and Fall of Yahoo Messenger: A Digital Time Capsule

Yahoo Messenger was notable for introducing several features that later became industry standards: