Can topic and placement be used together in Display?
Re: Can topic and placement be used together in Display?
If you target a topic ( with who knows how many placements) and a single placement , the target is an intersection between them. Here could be the outcome :
1) If the placement is not considered by the system to be a part of the topic on any page, I think the impression count will be zero
2) If the placement is a part of the topic , or at least contains some pages related to the topic, you will receive impressions only from those pages that are context matched with ( placement + topic).
So if you think that there are pages on that website/placement about the topic that you have selected, it is a good idea to setup an Ad Group with placement + topic.