Control your network. Decide what properties and placements you want to bid on for each of your campaigns.
When turned on Run of Network allows your to automatically bid on new properties and placements as they join ZAN.
This is a great question! Placements belong to properties. A publisher can have multiple placements associated with their property. These can represent things like different areas of their website like registration or interstitial. Different placements can also represent different campaigns publishers are running a giveaway or a new page for a product launch.
You can choose to include or exclude properties and placements. Be aware that if you exclude a property then all of its placements will automatically be excluded as well.