A proxy is server that acts like a gateway or intermediary between any device and the rest of the internet. A proxy accepts and forwards connection requests, then returns data for those requests. This is the basic definition, which is quite limited, because there are dozens of unique proxy types
with their own distinct configurations.
Proxies make up our websites, online services, and other networks. People use proxies for many things: most proxies can change your IP address, while others can protect large websites or simply authenticate public Wi-Fi users.