Marketing plays a key role in the development of the tourism industry. Primarily, efficient marketing helps in attracting more tourists, which directly contributes to the economic growth of destinations. Tourism is a significant source of income for many countries, contributes to job creation and supports local economies. Promotion and promotional mix also play a very important role, as part of marketing, in the process of making a purchase decision among tourists. Through informing, persuading, supporting the purchase decision, creating a positive image, stimulating desire and extending the tourist season, promotion helps tourist destinations to attract and retain tourists. In a world where competition among tourist destinations is increasing, effective promotion can be crucial for success. In this paper, the concept of marketing in tourism, promotion in tourism is explained, and through research on respondents of different age groups, the importance of promotional activities in the decision making of clients in tourism is additionally emphasized