A proxy service is an intermediary server that acts as a gateway between a user's device and the internet. When a user sends a request to access a website or online resource, the proxy forwards the request on their behalf and then relays the response back to the user. This process can help mask the user's real IP address, enhance privacy, bypass regional restrictions, and improve security by filtering malicious content. Proxy services are commonly used in both personal and organizational settings to control and monitor internet usage, protect sensitive data, and manage network traffic.