As a compositional mode for electronic communication, intentionally withhold key pieces of information as a way to pull readers or listeners into a story or other document.

The answer to this question is the "TEASERS" and this is known and commonly used especially in the field of communication and information technology as a compositional mode for electronic communication, TEASERS intentionally withhold key pieces of information as a way or a solution to pull listeners into a story or other related documents.