The objective of this report is to encourage each GEO community to share, improve or start their developments on EVs and to adopt a coherent common framework. Experts from every GEO Societal Benefit Areas (SBAs) describe the level of development of EVs in their field. The relationship with transversal policy needs is analyzed from different angles. Data and research gaps are discussed and ways forward are suggested. A common set of criterias to define EVs is put forward. A recommendation is made for a better alignment of EVs with the GEO Data Sharing Principles as well as the FAIR principles (Findable, Accessible, Interoperable and Reusable). In this respect, solutions to make EVs more visible on the GEO platform are proposed. The target readership of this report is therefore all members of GEO and the Earth Observation (EO) community more generally.