Raspberry pi as router must not only distribute the Internet from the Ethernet port, but also from one WiFi adapter to another. This is very useful when traveling. For example, in a hotel it is easy to be in a room where a local access point finishes up badly. A powerful WiFi adapter will even catch a weak signal and distribute it to all available tablets and phones. It can also help save money where Internet charges are taken from each device separately.

Appearance of the router on the Raspberry pi with adapters Asus N14 and No brand Wifi adapter