Bandwidth is the term used to describe the amount of information that can be transmitted over an internet connection within a specific amount of time. Different hosting companies deal with bandwidth in different ways. Most set a limit on the amount of bandwidth that can be used in a month. Some charge you extra if you go over the limit, and others will disconnect you until the next month. There are some hosting companies which claim unlimited bandwidth. In order to understand what they are really offering, you need to understand bandwidth.