This summary provides an overview of the key points from the Distributed SQL Tips and Tricks blog series for December 2021. YugabyteDB offers multi-zone and multi-region deployment commands, allowing users to control tablet placement on a regional basis. This can be achieved by setting preferred regions and availability zones using the `modify_placement_info` and `set_preferred_zones` commands. Additionally, YugabyteDB supports ACID transactions for both APIs, YCQL, and YSQL, ensuring single-row linearizable writes and multi-row ACID transactions. Users can also create a read replica as part of their universe, which can be used to lower latency access and enhance support of analytics workloads. Furthermore, the blog series highlights new documentation, blogs, tutorials, videos, and upcoming events related to YugabyteDB.