This really straightforward segments includes every user who has been actively engaged for at least 5s on your site.

A user who has been active on the page - moving their mouse, clicking, scrolling - is engaged. 

Every 5 seconds Permutive pings out a 'Pageview Engagement' heartbeat. So if a user has had a 'Pageview Engagement' event they have been actively engaged for at least 5s.

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