UPnP is a set of protocols to share media on the network. It is also supported by a wide range of residential gateways and Network Attached Storage devices. UPnP support is now commonly marketed as DLNA.
Amarok has a built-in UPnP media share client so it can play tracks shared on the network. To enable it, useand check the box by the UPnP Collection plugin.
When a media share is discovered it will be shown in Local Music.
The UPnP feature depends on KDE's UPnP media server support. As of now (2015) there is no working UPnP kio-slave available.