Link-State is a type of routing protocol used in computer networks to determine the best path for data transmission. Unlike distance-vector protocols, which share information about the distance to destinations, link-state protocols share information about the state of each link in the network. Each router creates a complete map of the network topology, allowing it to make informed decisions about the most efficient routes. In a Link-State protocol, routers periodically send updates about their directly connected links to all other routers in the network. This information is used to build a synchronized view of the network, enabling routers to calculate the shortest path to each destination using algorithms like Dijkstra's algorithm. This results in faster convergence and improved network performance.