Marketing is crucial for the success of any organization, regardless of its type. While for-profit organizations use marketing to increase sales and generate higher profits, non-profit organizations apply it to raise awareness of their mission and attract individuals who will help them achieve their goals, either through volunteering or donations. Misuse of marketing in for-profit organizations can result in the loss of loyal customers and a decrease in sales, which directly impacts profit reduction. On the other hand, although non-profit organizations do not face the same risk since profit is not their primary goal, they encounter challenges in retaining members and attracting new donors. Failure to do so can threaten their mission and potentially lead to the organization's closure. This paper analyzes marketing activities through the lens of pre-sale and post-sale phases to clearly distinguish marketing from the sales process. Special emphasis is placed on digital marketing, which is examined through key changes in the business environment, such as the digitalization of information exchange, digitalization of customer interactions, and digitalization of databases. Marketing activities of non-profit organizations are directed toward users, donors, and the general public, with the aim of achieving positive social outcomes. Non-profit organizations must carefully investigate what attracts donors and volunteers and, based on these insights, adjust their marketing activities to meet their needs and desires. One of the challenges faced by non-profit organizations is retaining volunteers for extended periods, considering that volunteers receive no monetary compensation and are not obliged to remain with the organization. Therefore, it is crucial to create a pleasant and motivating environment where volunteers enjoy their engagement and do not perceive it as an obligation. It is particularly interesting to observe how religious organizations, as a specific type of non-profit organization, utilize marketing, especially digital marketing, in their work. Given that these organizations are often more conservative and slower to adopt changes, it is essential for them to develop thoughtful and tailored marketing strategies to ensure long-term success and stability. Inadequate application of marketing activities could lead to dissatisfaction among the members of the religious community. A positive example of a non-profit organization targeting members of the Roman Catholic faith is the "Studentski katolički centar Split" (SKAC_ST). "SKAC_ST" brings together a large number of students and young working people who strive to help those in need in their community and encourage others to do the same. „SKAC_ST“ increasingly uses digital marketing tools, which positively impacts their recognition and popularity.