Bot configuration to trigger action when a value changes

[jacopo_spinelli]

Hi everyone,
I’m creating an app to write data on a Google Sheet, this sheet is used by another application which changes some values in the Sheet.
My intention is to create a bot to send email or notification to the user who made the entry when the status of the entered line changes (e.g. the ack column status change from"empty" to “OK”).
I’ve done some tests but didn’t work, do you have any suggestion?
Thanks.