Open the Discord app on your Android or iPhone and click on the server whose nickname you want to change. Now tap on the three-dot menu icon in the upper right corner of the screen and click on ...

If you are the creator of a Discord server, you can change its name whenever you want. This is how to change your Discord server's name.

Change Notifications settings There is also another option to remove red dot by changing Notification settings for a specific channel or server. To do this: Launch Discord application.