BGP (Border Gateway Protocol) is commonly used for routing between different autonomous systems and managing IP address information in the network. In the context of configuring Direct Internet Access (DIA) through workflows, BGP is typically used to facilitate the exchange of routing information between the tvi (tunnel virtual interfaces) connecting an Internet Virtual Router (VR) with the LAN Virtual Routing and Forwarding (VRF). This allows the network to efficiently route traffic between different networks and the wider internet.