A forwarding address is an address that you give to someone when you move to a different place so that any mail that comes to your old address can be sent to you. It is typically used when someone moves to a new location and wants to ensure that any mail addressed to their old address is still delivered to them. The forwarding address can be provided to the post office, which will then redirect any mail sent to the old address to the new address. In addition to physical mail, forwarding email addresses can also be set up to automatically direct incoming messages to another email address.