Many women seem to get tangled up in an abusive relationship. Often they are vulnerable in some way and are the victim of a predator or a con man who can put on a good, caring act to start with. These men are simply using their partners, who may be better off financially than they are, or able to offer a place for them to move into.
Whatever the reason for the abuse, a restraining order is a legal document that prevents an abuser from coming close enough to continue the abuse after the relationship ends. At least, that is the theory. In reality, the abuser can break the conditions and still cause harm to the victim. The only real benefit is that he can then be prosecuted.