Overly simplified answer: A chat system for gamers.What is a discord server?
Yep, it started as a chat system for gamers. And while that may still be it's primary userbase it has also become very common for online communities to text chat, voice chat, and hang out. Many online forums and communities have a discord server too (and many set up a gateway between the their online forum and the chat server). People often run the app on their phone and just add bits to convos when then can.Overly simplified answer: A chat system for gamers.
More complete answer: Discord (software) - Wikipedia