Point-to-Point Tunneling Protocol (PPTP) is a method used to create secure connections over the internet. It allows users to send data securely by encapsulating it within a tunnel, which protects the information from unauthorized access. PPTP is commonly used in Virtual Private Networks (VPNs) to connect remote users to a private network. PPTP works by establishing a direct connection between two points, typically a client and a server. It uses a control channel to manage the connection and a data channel to transmit the actual data. While PPTP is easy to set up and use, it is considered less secure than other tunneling protocols like L2TP or OpenVPN.