In recent years, the explosive growth of the digital economy and the dominance of technology giants have brought serious challenges. Core platform services operated by global tech companies such as Google, Apple, Facebook and Amazon have many features that open up opportunities for abuse. In response to these processes, the European Union adopted the Digital Markets Regulation (DMA), which aims to promote fair competition and manage market dominance in the digital sphere. At the heart of its provisions are obligations for gatekeepers, i.e. organizations with significant influence on digital markets. Accordingly, the study presents the DMA‘s responsibility issues for gatekeepers.