Flashbacks can serve as a powerful storytelling device to provide insights into a character's past experiences, traumas, or significant events that have shaped their motivations and actions in the present. By showcasing these moments from the character's past, the audience can better understand the reasons behind their behavior, decisions, and beliefs. Flashbacks help in adding depth to the character by revealing their emotional vulnerabilities, fears, desires, and conflicts, ultimately contributing to a more nuanced portrayal and allowing for a deeper connection between the audience and the character.