One of the highlights of the Ad Changer plugin is campaign groups, which add great significance to the plugin. They aggregates several of your advertising campaigns together and displays them on the same ad location.
How Campaign Groups Work
The campaign group includes two modes, one is random and the other one is selective. Using the random mode Campaigns manager can show several campaigns on the same spot at a random order, while a “selected” campaign will use a weight parameter to give more impressions to selected campaigns.