Bandwidth is a measurement of information sent from and received by your site, and is measured in megabytes. For example if a single page size including graphics is 40kb, each time that page is requested you have used 40kb of the allowable bandwidth for the month.
Additional bandwidth is available at a small additional cost.
It is the rare site that requires in excess of 1 Gigabyte. See our rate sheet current bandwidth rates. Your daily bandwidth usage is recorded. At the end of each calendar month, the month's data is collected, the highest value is dropped, and the remaining days are averaged. If your average is then over the limits on your account, an additional charge will appear on your next bill.