Slash commands; a text-based command that shows up when a user types /
A UI-based command that shows up when you right click or tap on a message
A UI-based command that represents the primary way to invoke an app's Activity
A UI-based command that shows up when you right click or tap on a user
See
https://discord.com/developers/docs/interactions/application-commands#application-command-object-application-command-types