What is a common use of a proxy server?

A common use of a proxy server is to act as an intermediary for requests from clients. This function allows the proxy server to facilitate communication between a client and another server. When a client makes a request for a resource, such as a webpage, the request first goes to the proxy server. The proxy can then retrieve the resource on behalf of the client, potentially caching it for future use, filtering content, or providing anonymity in the process. This capability enhances security, privacy, and network performance, making it a crucial component in many network architectures.

In contrast, improving printing speed, managing user accounts, and storing files locally do not accurately represent the primary function of a proxy server. While these tasks may involve different types of servers or systems, they don't align with the specific purpose and functionality that a proxy server provides.