Here you can see which devices visitors used to view your site. Whether with a smartphone, a tablet or on a big screen.
This statistic is useful for example if you want to know for which screen sizes you should optimize your website and it helps you to use in which situations the visitors* come to your site. Together with other statistics such as the time of visits, it is easy to see whether your visitors arrive at your website on the go from a cell phone, or rather at their workplace with a large monitor.