Which characteristics describe completion actions?

The correct choice highlights that completion actions apply immediately and execute every time a predefined condition is met. This means that when certain criteria are fulfilled—for example, when a prospect engages with a specific piece of content or fills out a form—the associated completion actions kick into gear instantaneously. This allows for a seamless and responsive experience in managing marketing automation. This characteristic is essential for ensuring timely follow-ups and relevant content delivery based on user engagement.

The other options miss this aspect. While some characteristics of completion actions may involve criteria or automation, the defining feature is the immediate and recurring nature of their execution upon each relevant occurrence, which is what sets completion actions apart in effective marketing strategies.