The Data quality page

What is waiting

Queue figures counts what is waiting for someone: indicator readings to review, sessions held this month with no register, and people whose profile lacks a required detail. Last entry per project says when attendance was last recorded: fresh, quiet or stale, by the days set in Settings → Dashboard.

What is missing

Missing fields counts the current people whose record lacks what the dashboard counts by, such as sex or a place. A person may be missing more than one.