This functionality automatically uses host computers and the internet bandwidth within to send updates to other machines.
This can help you get updates and apps more quickly if you have a limited or unreliable Internet connection.
Hence, to conserve bandwidth, the feature should be manually turned off.
One of the more fascinating changes in Windows is the newPeer-To-Peer(P2P) delivery update mechanism.
This helps you save you a ton of wasted download bandwidth.
Windows 10s P2P sharing consumes your upload bandwidth and reduces the speed of your web link connection.
Further, this also stops your machine from receiving updates from other users.
source: www.techworm.net