1. A method for steering, by a user equipment (UE) within a visitor public land mobile network (VPLMN), traffic in a wireless communication system, the method comprising: transmitting, to a network, access network discovery and selection functions (ANDSF)-related information comprising information on at least one of a home ANDSF (H-ANDSF) configured by a home PLMN (HPLMN) or a visitor ANDSF (V-ANDSF) configured by the VPLMN; receiving, from the network, traffic steering information which is generated by the network based on the ANDSF-related information; and steering traffic based on the received traffic steering information.