A very simple analogy to use to understand bandwidth and traffic is to think of motorways and cars. Bandwidth is the number of lanes on the motorway and traffic is the number of cars on the motorway. If you are the only car on a motorway, you can travel very quickly. If you are stuck in the middle of rush hour, you may travel very slowly since all of the lanes are being used up.

Each time you visit a web site, you are creating traffic, because in order to view that web page on your computer, the web page is first downloaded to your computer (between the web site and you) which is then displayed using your browser software (Internet Explorer, Firefox, etc.) . The page itself is simply a file that creates traffic.