3. What are profile engagements? What is the difference between engagement and interaction?
Profile engagement - is one of the types of interactions, like a phone call or website visit. We count interaction as "profile engagement" when we can't determine how exactly the user interacted with your profile, but we know that he spent a significant amount of time on the page. For example, we can't track calls from the desktop or we can't track clicks if a user has an Ad Blocker installed.