Hi @safikhan,
visit_duration field won’t present when a visit contains just one user activity (like just a pageview). To deliver visit_duration we need at least two user activities in a session.
The absence of visit_duration is equivalent to visit_duration = 0; let’s take an example: a user searches for something in google and clicks on a community link shows google search results and landed on a community page and just closed the browser tab to exit from the community. In this case, a one-page view is recorded. There is no followed user activity after this page view to calculate user duration when generating ‘visits.visit-summary’ for this user session visit_duration won’t present.
