An Effective Bumper Ad Created, According To Google’s Best Practices, Includes A Combination Of Branding, Audio, And Breaking The Fourth Wall — Or Speaking Directly To The Camera. What Does Google Recommend You Avoid Using In Your Bumper Ad? February 26, 2021 Products, services, and domain Actors, animals, and comedy Text slides, subtitles, and voice-overs Graphics, promotions, and music