there are advantages and features of using social networks for the hotel business and there is a possibility and necessity of using social networks, both for large hotel companies and for small hotel enterprises have been proved. There is important to improve the use of social networks in the activities of hotel enterprises, including promotion of hotel products and services. The aim of this research is to measure the Effectiveness of Social Media in Promotion: Case Study of Small Hotels in Great Cairo. A comprehensive survey was conducted of 120 small hotels (3-star hotels -according to EHA, 2022) managers, front office managers and reception employees in Greater Cairo, and 110 questionnaires were retrieved, including 10 invalid questionnaires, bringing the number of questionnaires that can be statistically analyzed to 100 samples. A five-point Likert scale used to test the attitude of the participators toward research variables. Data collected were analyzed using SPSS (23). The main result of the research was that there was a there is a very important feasibility of converting the hotel into an online hotel according to the concept of modern electronic transformation. The research recommended that Hotels should give importance to the feasibility of converting the hotel into an online hotel according to the concept of modern electronic transformation, Hotels should have an official for designing messages and promoting the hotel on social networking sites and Hotels should have a specialized department to manage marketing and promotion through social media.