Router configuration refers to the process of setting up a router to manage network traffic effectively. This involves adjusting settings such as IP addresses, security protocols, and network preferences to ensure devices can communicate with each other and access the internet. To configure a router, users typically access its web interface through a browser, entering a specific IP address. From there, they can modify various settings, including Wi-Fi passwords, firewall rules, and port forwarding options, to optimize their network's performance and security.