People love to be entertained. That is why laughter has an enormous power when it comes to advertising. The use of humor in advertising campaigns does not only get the attention of consumers, it also make your product or service easier to recall or remember. If there is one advertisement that you seem to remember up to this day, I am sure it is one of those funny ads you saw on a billboard while driving on a highway.
[From 35 Cool Billboard Ads from Around the World | Best Design Options]