Within the context of social media networks and quality service, this study analysised the functions that social media can play as a mediator. The business-to-business (B2B) interaction that exists between the fast-food industry in Egypt is the primary subject of this study to analyze the mediating role of supply chain management. The study covers the area of Cairo, and data collection took place during the first quarter of the year 2022. The sample size was 462, and the response rate was 84.77%. It was discovered that social media networks have an effect on the flow of information throughout the supply chain as well as the quality of services provided in fast food apps. Significant changes have been brought about in both the supply chain and the quality of services as a result of the influence of social media. It helped explain why the supply chain's performance changed, which led to a better quality of service.