Coral Conservation: Global evidence for the effects of actions provides an essential resource for anyone dedicated to conserving or restoring corals. This comprehensive synthesis of global scientific evidence examines the effectiveness of conservation and restoration actions targeting stony, soft and cold-water coral species inhabiting a diverse range of marine habitats in tropical, temperate and arctic waters from shallow coasts to the deep sea. Addressing the urgent threats posed by climate change, invasive species, overfishing, and habitat destruction, this work summarizes evidence from actions in three core themes: protecting healthy reefs, mitigating human impacts, and undertaking active restoration. From establishing Marine Protected Areas to innovative techniques like coral gardening, the synopsis summarizes the evidence for practical actions and offers insights into their outcomes and applicability. Designed to guide decision-makers—resource managers, conservationists, policymakers, and local advocates—as well as those curious to learn about actions that could help corals, this accessible guide provides succinct information to support evidence-based conservation. By identifying the existing evidence and highlighting gaps in the knowledge, Coral Conservation can support practitioners and policymakers to allocate resources effectively by prioritising actions that work. By doing more of what works, we can reverse the loss of coral species and restore these vital habitats for the benefit of current and future generations. The authors consulted an international group of coral experts and conservationists to produce this synopsis. Funding was provided by A.G. Leventis Foundation and Oceankind. Coral Conservation is the 25th publication in the Conservation Evidence Series Synopses, and is freely available from the online Conservation Evidence database (www.conservationevidence.com) ensuring that users have ongoing access to updated research and assessments. Others in the series include Eel Conservation in Inland Habitats, Biodiversity of Marine Artificial Structures, Sub-tidal Benthic Invertebrate Conservation, Marine and Freshwater Mammal Conservation, and Marine Fish Conservation.