when a record is updated
This would be a trigger that will allow you to monitor when a record is updated and be able to pick a field on that record to watch instead of just when the whole record has been updated.
Sachin R Chavan commented
Mechanism to know which fields where updated in 'update triggers & actions' e.g. D365 Record Create/ Update Trigger will save processing & unnecessary code handling checks to detect whether a field of interest was modified or not.
Let say, I want to run my app only when certain field(s) is updated not when any arbitrary field in record is updated.
Note: I may be interested in multiple fields too not just one field.