This document presents an overview of viral marketing using influence propagation on social networks. It discusses the goal of viral marketing being to increase sales, customer acquisition, satisfaction and loyalty. Tools used in viral marketing include email campaigns, social media, online broadcasts and videos. Challenges include effective customer communication and turning a profit. Social networks can be represented as graphs and information diffusion models like independent cascade are examined. Research was conducted surveying 200 individuals on their social media use and effects of viral marketing ads. Results found Facebook was the most commonly used and videos/images were most effective at attracting consumer attention.