In this course, we explore the evolution of the concept of Ecosystem Services highlighted in the 2005 UN report entitled “Millennium Ecosystem Assessment” which led to the creation of the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) ten years later. We will analyse the data and tools used to quantify and map these services, and we will examine the limitations of this approach when addressing Sustainable Development Goals (SDGs). This reflection will lead us to the concept of the Nexus formed by the different SDGs and their dependence on services provided by nature.