This paper reviews the responsibilities and liability of online marketplaces within the Digital Services Act (DSA) framework. The DSA, proposed by the European Union, represents a comprehensive legislative initiative to regulate digital platforms and intermediaries, with a particular emphasis on online marketplaces. Specifically, the focus of this paper is on the obligations imposed on online marketplaces, shedding light on the regulatory landscape governing their conduct and responsibilities. This paper aims to examine the implications of the extended responsibilities of online marketplaces under the DSA. The analysis explores potential changes in their levels of responsibility, obligations, and measures for handling user-generated content. Through this, the aim is to contribute to the debate on regulating digital platforms, shedding light on key aspects of online marketplace responsibilities. This is performed using a critical policy analysis methodology, examining the legal content of the DSA regulation, and analysing the practical consequences of its implementation, with a special focus on how the DSA ensures a responsible and sustainable retail environment and what the increased requirements mean for online marketplaces in practice.