A router is a device that connects different networks and directs data traffic between them. It helps your devices, like computers and smartphones, communicate with each other and access the internet. When you send a request, such as loading a website, the router determines the best path for the data to travel, ensuring a smooth connection. In a home network, the router often acts as a gateway to the internet, allowing multiple devices to share a single internet connection. It can also provide security features, like a firewall, to protect your network from unwanted access. This makes it an essential part of modern digital life.