A mesh network is a type of network topology where each device, or node, connects directly to multiple other nodes. This creates a web-like structure that allows data to be transmitted through various paths, enhancing reliability and coverage. If one node fails, the network can still function by rerouting data through other nodes. Mesh networks are commonly used in wireless communication, such as in Wi-Fi systems for homes and businesses. They are particularly useful in large areas where traditional routers may struggle to provide a strong signal, ensuring consistent connectivity across the entire space.