I would speculate that he is wondering if ACS can be configured so that engagement can be measured, in the form of a lead score, as profiles engage with content delivered through Adobe Campaign Standard. E.g. If an audience was sent a delivery, non-opens would merit no score, opens would merit "x" score, and clicks would merit "y" score. As campaigns are carried out, these scores would lead to a better determination of profiles engaging with your content vs. those that are not.
