Viral marketing

This is an online form of word-of-mouth advertising. If your message is interesting enough, it will be transmitted from one person to another, or shared through email, social networks, blogs, and so forth. Your message can be in the form of a video, an advertisement, a website, an image or information. Think of how humorous videos get shared online. Although viral marketing is often difficult to replicate, the analytics tools within most social networks can tell you which types of content you share are more likely to go viral, or have more "virality".