Target topics, placements, and audiences
This article refers to the legacy version of the Ad Exchange interface.*
Beginning early 2016, the legacy interface will be deprecated and all non-RTB campaigns created in this platform will be turned off. If you're already using the new interface, you can find most of the new processes in the following:
Pretargeting: create and define pretargeting configurations
Hosted bidding: build and maintain campaigns
Query Tool: create queries and run reports
* If you are not already using the new interface, contact your account team.
When you combine topics, placements, and/or audiences in a single ad group, an impression has to meet all of the targeting types for your ad to be eligible to serve. In other words, Ad Exchange combines targeting types with a Boolean AND.
While combining these targeting types can help you hone in on your target audience, doing so also limits your reach. If you're not reaching your impression goals in an ad group with multiple targeting types, consider removing one or more. If you'd like to target impressions that match one or more targeting type (in other words, a Boolean OR relationship), create separate ad groups, each with its own targeting type.