Welcome to this quick guide I whipped up to help explain what User Apps are on Discord, so Server Owners/Admins/Moderators can know what to expect. (Since Discord doesn't actually have a decent Support Article on User Apps at the time of writing this)
Note
Yes, I will be using the term "Bots" instead of "Apps" here, just for ease of understanding since not everyone has switched over to Discord's new branding for Bots :)
Important
This guide assumes you have familiarity with what Slash Commands and Context Commands are. If you don't, please read this Support Article first!