The poster depicts Harry Potter and his friends in an intense battle scene at Hogwarts to represent the climactic events of the film. Dark colors and serious expressions establish a somber tone for the final installment. The trailer features dramatic music and intense action scenes from the climactic battle to make audiences feel empathetic and on edge. Daniel Radcliffe's interview, discussing his character development and important scenes, aims to make the actor seem relatable to young fans. The marketing strategy involved releasing trailers in advance, conducting daytime interviews, and leveraging the large existing fanbase through franchise tie-ins.