George Adams, Adoptium Chairman and PMC member explains what is Eclipse Temurin in this video.
The Eclipse Temurin™ project provides code and processes that support the building of runtime binaries and associated technologies that are high-performance, enterprise-caliber, cross-platform, open-source licensed, and Java SE TCK-tested for general use across the Java ecosystem.
Learn more:
https://adoptium.net/temurin/