Branching storylines are narrative structures that allow a story to diverge into multiple paths based on choices made by the reader or player. This technique is commonly used in video games, interactive fiction, and some novels, where decisions can lead to different outcomes, characters, and endings. These storylines enhance engagement by giving the audience a sense of agency, as their choices directly influence the direction of the plot. Popular examples of branching storylines can be found in games like The Witcher series and Life is Strange, where players navigate complex narratives shaped by their decisions.