On Discord, "Idle" refers to a user's status indicating that they have been inactive for a certain period of time. This status is automatically set by Discord after a user has been inactive for 5 minutes, meaning they have not sent any messages, clicked any buttons, or interacted with the app in any way during that time.
When a user is in Idle status, their username in the user list will appear in gray, with a moon icon next to it. This can be helpful to other users who may be looking to see who is actively available and online.
It's important to note that Discord's idle timer can be adjusted in the app's settings. Users can choose to shorten or lengthen the time it takes for them to go idle, or disable it entirely if they prefer to always appear as online. This can be useful for those who want to be available to receive messages even if they are not actively using Discord.
Overall, the Idle status on Discord is a helpful feature that allows users to see who is actively available to chat and interact with, and also helps to prevent clutter in the chat by indicating when users are away from their keyboard or not actively using the app.