The topic of this final paper is the analysis of the benefits and drawbacks of the collaboration between hotels and online reservation systems, using selected examples. One of the key tools in tourism industry marketing is affiliate marketing. This specific tool is considered highly effective as it allows for increased visibility of products (in this case, hotels) and provides an opportunity to establish credibility and strengthen the hotel brand image. Therefore, many hotels opt to use various online reservation systems to compete in the highly competitive market. Through collaboration with online reservation systems, hotels achieve mutual benefits. The purpose of this paper is to present the advantages and disadvantages of hotels collaborating with online reservation systems, with a focus on the hotel's perspective. The paper will provide insights into various aspects of the collaboration and highlight the importance and benefits hotels gain by using these systems. Additionally, potential drawbacks of such collaboration will be identified to offer a comprehensive overview of the situation The paper will showcase examples of specific hotels and online reservation systems to illustrate different scenarios and outcomes of collaboration. The thesis emphasizes the analysis of the advantages and disadvantages of this cooperation, with a focus on the hotel's viewpoint. Moreover, the paper will highlight various benefits that hotels can gain by working with online reservation systems, providing a comprehensive overview of the situation. Through the analysis of advantages and disadvantages, the paper will enable readers to better understand the significance of the collaboration between hotels and online reservation systems in modern tourism.