What is Viral Advertising?
(Also known as viral marketing). Releasing a video or other creation in hopes that it will be widely forwarded and be beneficial for a product or service referenced in the creation. If the creation seems amateurish even though it was created by professionals paid by the organization that benefits from being referenced, the effort is known as "subviral".
A cartoon showing three bathroom stalls with balloons of the expressions "Butt", "Wipe", and "Errr" should be suspected of being viral marketing for Anhaeuser Busch.