A router in a home network functions as a device that forwards data packets between devices within the network and the internet. It enables multiple devices, such as computers, smartphones, and smart home equipment, to connect to a single internet service connection. Routers manage traffic efficiently, directing data to its appropriate destination using NAT (Network Address Translation) and IP addressing. Additionally, they often come with built-in security features, such as firewalls and encryption, to protect users’ personal data while browsing online.