This report lets you see which service providers your visitors are using and the domain to which they connected.
You can add a secondary visitor dimension, like Country/Territory, to better understand where service providers are located, and hence where visits originate.
Having insight into which service providers your visitors use can help you design your site's content. For example, if your site offers video content and you see that visitors are evenly distributed among providers that offer a variety of connection speeds, you can offer them a choice of video quality (720p and 360p). If the bulk of your visitors use providers that offer high connection speeds, you can offer high-definition video, along with higher resolution graphics and a higher quality audio-compression format.