Triaging work item – Task
Triage field refers to the process of assessing the effort to handle a task. This field is designed to track the state of that decision process.
Pending(default) – means the task is waiting for a decision on how to handle it.
More Info – means you need more info to make a decision. The proposer of the task is supposed to provide the additional info and reset the triage state to pending.
Triaged – means a decision to handle the task has been made.
Info Received – means you have already received the related info from the proposer of the task.
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BTW, you can look at the process guidance to get more detail information.
Go to the work item and select “task”, you will find a description of the use of the field Triage.