The scan action setting determines what the scan will do.
Confirm: The scan will identify security threats and then ask what action to perform.
Log only: The scan will only identify security threats, without taking any action against them.
Take the recommended action: The scan will automatically respond to security threats according to the recommendations of Trend Micro experts.
Whether the scan will remove the security threat, place the file in quarantine, or skip over it depends on the type of threat. Trend Micro reviews and revises the automatic responses periodically, so they may change after an update.