Viral marketing has been able to successfully allow marketers to increase the value of free services online, because referrals are the major way that most people market with free services. So, these tools of Internet marketing have been able to allow people to significantly pursue various affiliate programs in order to increase the value of these free services. When free services are everywhere to be found, they lose value. Therefore, viral marketing solves this problem by making people refer one another to a various product or service. When people receive referrals, they believe that a service is more valuable. This is simply a part of human nature. Therefore, viral marketing is a great Internet marketing tool that marketers can use to increase their web exposure.