This message is shown by Application Bot when the help command is sent to a channel:
Application Bot BOTtoday at 4:20 PM
Slash Commands Required
Application Bot now supports slash commands!
Hit the slash key to view and use commands from within Discord.
Some servers will need to add additional scopes for slash commands to work. This can be done very easily by simply following the link: https://discord.com/api/oauth2/authorize?client_id=418842777720193037&permissions=8&scope=bot%20applications.commands
Application Bot Basic - Buy Premium To Unlock More Great Features.
You can always get more help on the command list of Application Bot by visiting their support server or their website: