This course will teach you the basics of viral marketing, a powerful marketing technique that uses social media and word-of-mouth to quickly spread a message or product. You will learn how to create content that is engaging and shareable, how to use influencers to amplify your message
From Wikipedia
Viral videos are videos that become popular most often through a viral process of Internet sharing, primarily through video sharing websites such as YouTube as well as social media and email. For a video to be shareable or spreadable, it must focus on the social logics and cultural practices that have enabled and popularized these new platforms.