What triggers a trigger campaign to execute its actions?

A trigger campaign in Marketo Engage is specifically designed to respond to certain actions taken by recipients or leads. This means that when a lead performs an event, such as clicking a link in an email, the trigger campaign activates and executes the defined actions associated with that trigger. This type of campaign allows for responsive and timely marketing actions that are tailored to individual behaviors, enhancing the relevance and effectiveness of the communication.

The other options do not align with the mechanism of a trigger campaign. A predefined schedule refers to scheduled campaigns, which execute based on the time rather than recipient actions. General filters applied to all recipients may help segment audiences but do not independently trigger campaigns to act on individual behaviors. Lastly, a random selection of database entries does not align with the purpose of a trigger campaign, which relies on specific, identifiable actions taken by leads. Therefore, the essence of a trigger campaign lies in its ability to react to user engagement, making the action taken by the recipient the definitive factor for execution.