Informative
ManageBot has a lot of informative commands you should definitely check out!

Inspect users from all across Discord

A user fetched with the /user fetch command.

Display information about Discord Apps

You can see statistics about a Game or other bots.
The /web application-info command used to get information about a game
The /web application-info command used to get information about a bot

Various information commands for your server

The /emoji info command
The /role info command.
The /channel info command.
The /server info command.