HostGator provide Unlimited Bandwidth with all their shared hosting plans.

Bandwidth can be best described as gas for a car. If your website runs out of bandwidth nobody will be able to visit it. 1GB of bandwidth is equal to over 100,000 hits (if you have a lot of images and other heavy stuff in your site (like 7 images of 1MB each), you can expect less the 100,000 hits). The average account with HostGator uses less than 2 GB of bandwidth a month (you can you as much as you like: 10GB, 20GB No Problem). Your bandwidth number used will reset back to zero on the first of every month.