By the end of 2020, 21 of the 169 Sustainable Development Goal targets will mature. This summary reviews progress made towards those targets at the global level based on available data as of June 2021. It takes stock of how far the world has come in meeting these commitments by mid-2021 and provides an assessment in stoplight colours. Of these 21 targets, 12 are linked to the UN Convention on Biological Diversity Aichi Biodiversity Targets. Therefore, the summary presents separately the biodiversity-linked targets from the other 2020 targets.