If a ticket is opened and has time tracked on it but nothing is submitted, then that ticket is unattended. An agent receives Unattended Tickets point for opening and closing the ticket without actually doing any work on that ticket.
Agent opens ticket #123
Agent closes ticket #123 (1 Unattended Tickets point rewarded)
Note 1: In the event the agent were to come back to ticket #123 within the same day that the Unassigned point was awarded and do work on that ticket (such as send a public comment) then the Unattended point would be removed.
Note 2: A ticket may only be counted as an Unattended Ticket a single time within a day period. In other words, if an agent opens the same ticket and takes no action on it multiple times, it will only count once as a single Unattended point. A single ticket may count as being unattended multiple times if it is unattended different days.
Common uses of Unattended Tickets
The Unattended Metric is useful to help agents that may be cherry picking tickets. I.e., Opening a ticket and looking at it but taking no actual action such as submitting a comment, assigning the ticket, or changing the status.
Downfalls of Unattended Tickets
there is also a chance this metric doesn't accurately reflect tickets that are truly due to cherry picking. For example, an agent may be looking at historical tickets to gain context on a customer issue, and in this case, they wouldn't be submitting an update on the ticket but it would still be counted as an Unattended Ticket. For this reason, many people prefer to use the Unattended Unassigned Tickets metric since it counts only tickets which are not assigned to an agent.