Ad providers, such as the Adobe Ad Decisioning server, require configuration values to enable connection to the provider and for the ad resolver to work.
Although optional, using this is highly recommended. It enables ads to be served even when your request to the ad server is invalid, content is incorrectly configured, Ad Decisioning is experiencing delays in propagating the data, or one of the Ad Decisioning back-end processes is malfunctioning or unavailable.
You can include other targeting parameters depending on your needs and on the ad provider.