Allow you to quickly delete messages, timeout users or execute custom commands. They can be configured in Settings > Moderation > Moderation buttons
Moderation mode button
Toggles whether Moderation buttons are shown
Usercard
Contains useful information about a user, action buttons as well as their recent messages. Can be opened by clicking someone's username in chat or by typing /usercard username
User Timeout Buttons
Allow you time a user out from their Usercard. They can be configured in Settings > Moderation > User Timeout Buttons