What is one benefit of using the medium the author used in "great rock and roll pauses

In the book "A visit from the Goon Squad" written by Jennifer Egan, a story about the mid-song pauses in some rock and rolls are presented in a powerpoint presentation format. The PowerPoint slides were created by Alison, Sasha's 12-year-old daughter and it describes the events that happen between 14 May and 15th of some year in the 2020s. The slides talk about Lincoln who look like his father but he is thinner. Lincoln is obsessed with pauses in rock and roll songs.