Once you have everything connected, the ISP will send the internet signal to the dish in space which then relays it to you. Every time you make a request (new page, download, send an email, etc) it goes to the dish in space and then to the (ISP’s) hub. The completed request is then sent back through space, to your dish and then to your computer.
Satellite internet would be better if you live in an area where other internet options such as cable or DSL isn’t available.
References
1. What is Satellite Internet? http://www.plugthingsin.com/internet/satellite/