What is a PPP Adapter? [closed]

What is a PPP adapter, I have learned that It helps in connecting LANs to WANs. How does it help in normal pc? I have got two interface IPs for my pc when I typed the command ipconfig /all. One is for Ethernet adapter interface, another is for PPP Adpter.

PPP stands for Point to Point Protocol. The adapter provides the computer the ability to use the protocol over the existing network interfaces. Originally PPP was used for dial-up access via Plain Old Telephone Systems (POTS), but is now used in conjunction with DSL internet connections and some VPN services to provide a framework for authentication and encryption between two points (usually PPPoE aka PPP over Ethernet).