This chapter examines eco-labels as key tools for green communication, helping consumers align purchasing decisions with sustainability. It provides an overview of eco-label types and the regulations ensuring their credibility, while analyzing the roles of key stakeholders—consumers, producers, and third-party organizations. Through case studies, the chapter highlights the successful brand adoption of eco-labels, showcasing their integration into marketing strategies to promote sustainability and build trust. Moreover, it addresses the barriers to broader adoption, focusing on challenges such as low consumer awareness and limited understanding of the sustainability messages eco-labels convey.