This series of short videos, produced in collaboration between NOAA's National Geodetic Survey and The COMET Program, a part of UCAR's Community Programs, provides an introduction to geodetic datums for anyone who uses mapping products or other geo-spatial tools. In the first video, "What are Geodetic Datums?" (4:36), we explain the basic concepts behind geodetic datums, where they are used, and why it is important to know about and use the correct datums. In the second video, "How Were Geodetic Datums Established?" (3:12), we explore the history of geodetic datums in the United States, and how they were established at a national level to assure consistency across mapping applications. The thrid video, "What Is the Status of Today's Geodetic Datums? (4:49)", examines the use of the current primary geodetic datums used in the US, NAD 83 and NAVD 88, the challenges in maintaining these datums, and the inconsistencies that arise when they are used together with the latest satellite-based mapping technologies. Finally, in the last video, "What's Next for Geodetic Datums?" (4:41), we look at current plans for developing more accurate horizontal and vertical datums, (referred to respectively as geometric and geopotential datums), the expected benefits and impacts, and the importance of preparing now to adopt these new datums.