Viral Marketing is about ‘infecting’ people. If each ‘infected’ individual shares the marketing message to a single other individual, the viral epidemic will gradually grow in a logic curve. As long as each individual passes the message on to one other person, the marketing campaign can continue to grow until each member of the potential audience has been reached. Eventually, the campaign will generate less interest from the target group and the curve will taper off; the campaign is dying out.
Apple maintains it’s viral appeal, with the iPhone X through their launch of the "Selfies on iPhone X" campaign. The secret to this example of viral marketing (which has clocked up over millions views both online and offline) is very simple: a product so great that it turns people into fans of the brand all on its own. People love themselves. If they have the possibility of spreading this love digitally through selfies, it’s almost a guaranteed win. The iPhone X’s brilliant selfie feature spread virally through various media forms before apple repurposed the viral content into one masterpiece, the iPhone X selfies film. As one of the YouTube comments says, “It’s the most beautiful thing I’ve ever seen”… This viral marketing through video has allowed Apple to spread key features such as their Portrait Lighting effects and their TrueDepth camera.