This research project focuses on the effect of social media marketing on the buying behavior of customers in the fashion industry, with a specific study conducted on Zara. The aim is to understand the significance of social media marketing, factors affecting customer buying behavior, and the impact of social media marketing on Zara's customers. The research methodology includes interpretivism research philosophy, inductive approach, and both quantitative and qualitative data collection methods. The findings will provide insights into the role of social media marketing in the fashion industry.