Which device brings the traffic, and the bigger orders?

Pick a device. Each channel stays faded and the device's share is drawn solid in front.

SumsThe device is a share of the channel

A channel's sessions and orders are its devices' added up, so the solid part always fits inside its slice.

AveragesA device can spend more than its channel

An average is not a sum, so a device can sit above its channel. Pick Desktop: each solid slice runs past the channel's value, marked by a dashed line.