Soils host a tremendous diversity of organisms that are fundamental to terrestrial ecosystems. Soil biodiversity drives many ecological processes, including soil formation, nutrient and water cycling, climate regulation, production of food, medicine and fibre, disease and pest control. In the presence of a changing change, land degradation and biodiversity loss, soils have become one of the most vulnerable resources in the world. The UN Food and Agriculture Organization (FAO) is hosting the Global Symposium on Soil Biodiversity (GSOBI20) at FAO headquarters in Rome, Italy. This science-policy meeting is co-organized by the Global Soil Partnership (GSP), the UN Convention on Biological Diversity (CBD), the Intergovernmental Technical Panel on Soils (ITPS) and the Global Soil Biodiversity Initiative (GSBI). For more information check the GSOBI20 website.