It allows you to share a high-speed Internet connection among computers/devices in your home - which can be online at the same time.
Allows you to save money by sharing a single Internet connection.
To share a printer among several computers.
To access files easily from your networked computers without having to email or copy them.
To play networked or Internet-ready video games like Microsoft Xbox.
To help protect your computers and files with built-in firewall security.
To access the Internet from your laptop throughout your home.