"Hey wait... why aren't my contacts being displayed?"
A good place to check is to see if you are trying to display multiple campaigns on one display URL. At this time you can only display 1 campaign on a single URL.
**As should all your campaigns. They all need to have different display URLs.
If by accident you do have 2 campaigns set to display on the same url, then your notifications will not function properly.
For example, let's say you create a campaign for users that "recently purchased an item" and another for users that "subscribed to the newsletter". You cannot have both of these 2 unique campaigns displaying on the same URL. Instead, we'll need to set these campaigns to display on two separate URLs.
For more information, watch this video for where you should place your proof pixel to capture and display!