A server is a specialized computer or software system designed to provide services, data, or resources to other computers, known as clients, over a network. These services can range from delivering web pages and email to storing and managing files or running applications. These machines run on a client-server model, where clients request specific services or resources, and the server fulfills these requests.
Servers are distinct from personal computers in their purpose and capabilities. While personal computers are optimized for individual use and have a user-friendly interface, servers are built for performance, reliability, and scalability to handle multiple requests from numerous clients simultaneously.