The Term "Outstream player"
The Outstream Player is a special player tag used to display ads in your web page, only when a relevant ad is served back. This gives your web site viewers a clean experience without any blank or space taking players. When an ad is served from one of your preferred Ad vendors, the Outstream Player will automatically expand itself on your page.
Your viewers can then choose to close the player manually or watch the ad. At the end of the playback, the Outstream player will automatically collapse and hide from view keeping your web page experience nice and clean.