A web server is a computer program or device that is responsible for storing, processing, and delivering web pages and other content to clients over the internet. It acts as the backbone of the World Wide Web, allowing users to access and interact with websites and web applications. The web server receives requests from clients, such as web browsers, and responds by sending the requested content back to the client. It also manages the communication between the client and the server, ensuring that the correct information is delivered in a timely and efficient manner. Without web servers, the internet as we know it would not exist, making them an essential component of the modern digital landscape.