This report lets you see which internet service providers your traffic uses.
You can add a secondary dimension, like Country/Territory, to better understand where service providers are located, and hence where traffic originates.
Having insight into which internet service providers your traffic uses can help you design your site's content. For example, if your site offers video content and you see that traffic is 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 traffic uses providers that offer high connection speeds, you can offer high-definition video, along with higher resolution graphics and a higher quality audio-compression format.