A proxy is an intermediary server that acts as a gateway between a user and the internet. It can be used to access websites or services that may be blocked or restricted in certain geographical locations, or to enhance privacy by hiding the user’s IP address and other identifying information. Proxies can also be used for web caching, load balancing, and data filtering. There are different types of proxies, including HTTP proxies, SOCKS proxies, and transparent proxies, each with its own specific features and functionalities.