The combination of the documentary, radio advert, and print advert for the "LOL" product are highly effective because they maintain consistency across multiple elements. They use the same title, voiceover, slogan, scheduling information, interview clips, images, graphics, themes, and colors to clearly link the different media and convey the same fun, youthful tone about laughter. These similarities help tell audiences that the documentary and ads are promoting the same product and give them a sense of what to expect in an engaging way that will appeal to the target teenage demographic.