1. Opening title sequences advertise the production companies involved in financing and creating the film to establish expectations and credibility. They also promote the companies' brands. 2. Title sequences list star actors first to highlight their importance in drawing audiences, as movie stars are bigger draws than producers or directors. 3. Title sequences introduce audiences to the film's characters, setting, genre, and themes through visuals and sound in an abstract but intriguing way over 2-3 minutes to capture attention and draw viewers into the full movie.