Whether anyone opened the post

Traffic overview

Notice a quiet stretch after a cadence change, a domain cutover, or an outage.

Use sessions to stop repeating briefs that nobody opens. When a topic draws visits, schedule more of that work on that site and keep the template that produced it. When a cluster of posts gets nothing after they have been indexed, change the angle or stop producing them. The calendar should move because of readers, not because the interval elapsed and the template had another theme left. If you cannot see sessions, you cannot tell those two situations apart, and the schedule will keep spending the month on the quiet cluster.