YugabyteDB has released several updates to its documentation for December 2020, focusing on improving multi-region deployments, database security, role-based access control, column-level encryption, audit logging, JSON support, transactions, and the WITH clause. The new documentation provides detailed information on various features such as row-level geo-partitioning, fine-grained authentication, trust authentication, and more. Additionally, updates have been made to the Yugabyte Platform documentation, which includes installation, configuration, deployment, backup, security, and troubleshooting guides. These updates aim to provide users with a comprehensive understanding of YugabyteDB's capabilities and features, enabling them to make the most out of its distributed SQL APIs.