Use Cases: Automation to Lock Row

Cleversheet ✭✭✭✭✭✭
edited 12/09/19 in Smartsheet Basics

I'm taking the Process Solution Certification Exam on Thu 10/3. One of the features to be tested is Lock Row as an automation workflow. I've searched high and low within the Smartsheet Help system (including watching videos I thought could help) but can't find anything more sophisticated than something like, "When everything is completed on a row mark it as locked."

Are there other typical kinds of cases where one would lock a row? It appears Automation can't UNlock a row, so it's not like you could lock it temporarily based on a condition set, and then unlock it automatically when the conditions change. Pretty much looks like a one-way street.

I don't want to flub my certification because I'm unfamiliar with this feature (having never had occasion to use it), but it seems odd Smartsheet would specify Lock Row as a criterion but not have anything in their Help to describe its use cases.