People often remember funny or entertaining ads. However, this doesn't mean that these ads are effective. If the ad's humour relates to gloating (joking/laughing about others' misfortune), it activates negative emotions and motivating people to avoid the shown behaviour. Therefore, for a humorous ad to be effective, you need to ensure that the humour has a purpose - after the joke, a solution is offered which activates positive emotions. Read more below.