This question appears because a website that serves audio and video wants to deliver the content with better performance by having users who are playing the same content share their bandwidth. This allows the audio or video to play more smoothly, without skips or pauses from buffering. This is called peer-assisted networking, since peers on the network assist each other to provide a better experience. Adobe Flash Player will share bandwidth using peer-assisted networking only with your permission.
If you select Allow, the website is granted access to share your bandwidth, and your media playback will benefit from the bandwidth of others.
If you select Deny, the website will not be allowed to share your network bandwidth, and your media playback will not benefit from the bandwidth of others. Depending on how the site is designed, some functionality may not work.
If you select Remember, your selection of Allow or Deny is remembered in the Settings Manager in the Peer-Assisted Networking panel, and you won't see the peer-assisted networking pop-up question again for that website:
If you select Always Ask for a website in the Peer-Assisted Networking panel in the Settings Manager, you'll see this question each time that website wants to share your bandwidth. You can also use the Peer-Assisted Networking panel to change settings you saved previously for a particular website.
If you select Disable P2P uplink for all in the Peer-Assisted Networking panel in the Settings Manager, Flash Player will not ask you about sharing bandwidth and will not permit it for any website.