This chapter reviews the main literature on inter-organisational networks, highlighting the main factors driving their formation. By developing a comprehensive taxonomy, the chapter seeks to enhance understanding of how companies collaborate to sustain competitive advantage through ongoing innovation and value maximisation. The chapter concludes with a focus on Service-Dominant Logic, a key theoretical framework in the literature on value co-creation within inter-organisational networks. Particularly, the author underscores the relevance of interactions and relationships as the foundation for value co-creation and the involvement of stakeholders.