As the name implies, this will allow you to become host in a particular game room.
e.g. /switchost Bill 1 reason
By typing that in, you will force a user named Bill, who is currently not the host, to become host in a game room number 1.
This is especially useful for those Member Pluses affiliated with the technical support committee and community committee. By having this privilege available, you can provide assistance to multiple Voobly players all at once, should you choose to do so. This does not mean, however, that you can take over game rooms in a lobby without the actual host’s permission. As that action can prevent other users from playing a game, that is considered to be an abuse of this particular privilege. Any abuse of this privilege, or any privilege associated with the Member Plus program can lead to the ultimate removal from the program.