According to Wikipedia advertising is:
a form of communication intended to persuade an audience (viewers, readers or listeners) to purchase or take some action upon products, ideals, or services. It includes the name of a product or service and how that product or service could benefit the consumer, to persuade a target market to purchase or to consume that particular brand.
By that, or any other definition, this is almost certainly the greatest ad of all time.
You know I’m right. You’ll hate yourself for admitting it, but you know it’s true.
It’s the dancing dog that does it.
PS - I’m not (entirely) joking.
Adverts image by Tim Lings on flickr