Bandwidth is like a checking account. Each page containing pictures, text
and tables are made up of bytes of data. Each time a page loads the pages
value in bytes is subtracted from your "checking" account.
example: 2 GB (GigaBytes) is 2 billion bytes of data. If your home page
is 100 bytes, each time it is loaded by a visitor 100 bytes will be subtracted
from your 2GB account.