We're setting up an activity that will display a pop-up after 30 seconds of browsing. The activity will also display only on selected pages, not site-wide.
Will Target count unique visitors of the activity as the people who actually saw the pop-up, or will it count also visitors who have not spend 30 seconds of browsing?
If it counts any visitor, would you recommend firing an impression event, or relying simply on a segment that filters visitors who have spent 30 seconds on the site? Or some other solution, like an Audience Manager audience?