Viral marketing utilizes existing social networks to spread brand awareness through self-replicating viral processes, similar to how viruses spread. It can use word-of-mouth referrals enhanced by online networks. Viral promotions may come in the form of videos, games, images or text messages. Facebook is a fertile ground for viral marketing, with over 3.3 million users in India where growth is one of the fastest in the world at 354.8%. The top activities on social networks are checking what friends are doing and private messaging. Viral marketing enables the promotion and participation aspects of marketing through word-of-mouth and connections on social media.