ASP.NET Hosting Bandwidth is used to describe the amount of data that can be transferred to or from the website or server, measured in bytes transferred over a prescribed period of time.
This can be more accurately described as “Monthly Data Transfer.”
Some hosting companies offer limited ASP.NET Hosting Bandwidth, so when you reach by example 1 GB then your site will stop or you should pay for the extra Bandwidth usage.
Other hosting providers offer unlimited ASP.NET Hosting Bandwidth, so you should not worry about your usage.