Online promotions have become an integral part of marketing in modern times. Digital marketing involves creating content intended for a wider audience, which means that communication of a product or service must be targeted, clear and direct. Diving centers in Croatia do not have overly pronounced online promotions of their services and programs, which leads to tourists not knowing that diving centers and their services exist. For this reason, it is important to expand promotional activities, as well as the activities of diving centers and attract more consumers to the Adriatic coast. Digital marketing is great so that foreigners can learn more about the programs and activities of diving centers. For example, advertising through social networks, organizing promotional events at the beginning of the season or promotional prices at certain periods. This final paper investigated the types of promotion, the diving center Scuba Adriatic, and research was carried out on the importance of online promotion in the success of the diving center. Furthermore, the activities of online promotion of the diving center are proposed.