Bandwidth is the amount of data that is accessed while viewing a website. Every time a user views a website, data is transferred, and the measurement of that transfer is bandwidth. In general, images, audio files and video files are higher in bandwidth than text. That means that if you have a more burdensome website in terms of bandwidth – if you have lots of video or streaming audio, for example – you have a higher bandwidth requirement than someone with a simple text-only website, or someone with only a few low-resolution images. Some web hosts offer unlimited bandwidth, and some place a cap on it.