They grab and hold attention. But they do more than that. They also help people process information and they imply causation. Aristotle identified the basic structure of stories, and many people have expounded on his ideas since. One model is the basic three act structure: Beginning, Middle and the End. This may not sound very unusual, but when Aristotle came up with it over 2000 years ago it was probably pretty radical.

https://www.blog.theteamw.com/2011/01/30/100-things-you-should-know-about-people-56-people-process-information-best-in-story-formton/