Facebook Marketing, which has a long list of favorable customer reviews, has a significant impact on consumer purchasing behavior. It is also clear from the glowing testimonials of past clients that new clients have a very high influence rate. Facebook is user-friendly, even illiterate people utilize it. Also, the rise of smartphones and the proliferation of the internet have altered the nature of mass communication. Social media websites are currently where people spend more time than regular hangouts and meetings. Facebook offers a variety of products and services, including social media platforms, advertising tools, and virtual reality technology The Facebook has had a significant impact is on consumer buying behavior. The article explored the ways in which Facebook influences consumer buying behavior in online, including social influence, targeted advertising, brand awareness, and customer engagement. The research was conducted in the month of January 2023. The researcher used a random sampling strategy. 240 participants were surveyed at random to determine the level of social network acceptability. The author concluded that Facebook can have a big impact on online shopper behavior. Businesses can more successfully attract and keep customers by utilizing the platform's social influence, targeted advertising, brand recognition, and customer involvement