A little bit more info.
You may have heard the term Internet Protocol or I.P.
This is the technology that is used to run the internet.
Every computer on the internet (even yours) has a unique i.p. address. It is in the format 328.567.111.422
So it is bit like a telephone number.
Now even though you may know web site google as www.google.co.uk the internet knows it as 66.102.9.99.
When you select www.google.co.uk it "dials" 66.102.9.99 and connects to the google computer, so it is very like the telephone system.
In fact if you put the following in the address bar at the top of your browser it will go to the google web site:
http://66.102.9.99
So each computer on the internet has a number rather like a telephone number, and when you want to go to a remote web site it "connects to" or "dials" the remote computer rather like your home phone dials a remote telephone.