I don't have any first-hand experience or knowledge about this product at all, but after looking at their website I think they mean that the device has a WiFi transmitter/receiver in it, allowing your phone, tablet, netbook, or whatever to connect to it wirelessly, much like your wireless router at home provides a WiFi access point to your equipment. The base doesn't access the internet via WiFi.. that's done via satellite.
Here's the page that describes the setup in more detail..
SkyMate | Wherever you go. Whatever you need.
Barry