A Local Area Network, or LAN, is a group of computers and devices connected within a limited area, such as a home, school, or office. This network allows users to share resources like files, printers, and internet connections. LANs typically use Ethernet cables or Wi-Fi to connect devices, making it easy for users to communicate and collaborate. LANs can vary in size and complexity, from a few computers in a small office to hundreds of devices in a large organization. They are essential for efficient data sharing and can enhance productivity by enabling quick access to shared resources and services.