These commands allow you to add or delete multiple bots from the same server to a room. This is different from SET BOT, which will allow you to set one bot to manage the room.
ADD - Add a bot to the room
DEL - Remove a bot from a room
EMPTY - Remove all bots from the room
LIST - List which bots are assigned to the room
/as help chan bot <topic>
One bot per room is generally sufficient. But you might have reasons to add multiple bots. For example, you might have one particular bot that sits in an entire set of similar rooms, such as all the public rooms that provide help. Then if someone needed a list of those rooms they could /whois the bot.