The American media critic Douglas Rushkoff was the first to coin the term Viral Marketing in his book ‘Media Virus‘ from 1994. Social media, including Facebook, Twitter and YouTube, play an important role in Viral Marketing. Platforms where information can be shared are particularly suited for this type of marketing. The goal is to spread the marketing message like a viral epidemic. That makes Viral Marketing a relatively cheap way to reach a large audience.
You may use both cash or non-cash incentives for referral marketing example, but a Chicago University study found that non-monetary incentives were more effective than cash benefits by 24%. It is also better to not confine referral to customers or employees alone, referral marketing websites can also be used to new customers and lure them into referral marketing programs.