There are some studies that explored the effect of social media on marketing and consumer buying behavior and there is still a need to further understand this effect. However, this study aims to explore the use of social media sites and the effect of social media on the buying decision of the commercial banks’ consumers in Jordan. The sample of this study conducted with 200 consumers to understand how consumers use social media and how it affects their buying behavior of different banking products and services. The findings show that social media affect consumer buying behavior by 69%. Also, consumers mostly used Facebook and it mostly affecting consumer buying behavior by 73% and the most influential factor that affects the relationship between social media and consumer buying behavior is interactivity by 63%. The implication of these findings suggests that commercial banks in Jordan should focus on their marketing strategy and they have the opportunities to seize the power of influence of social media.