Accompanying the growing importance of research data management, the provision and maintenance of metadata have obtained a key role in contextualizing, understanding, and preserving research data. Acknowledging the importance of metadata in the social sciences, the Consortium of European Social Science Data Archives (CESSDA) ERIC started the Metadata Office project in 2019. This webinar introduces the CESSDA Metadata Office (MDO) and its various activities. A special focus of the webinar was on the CESSDA Metadata Model (CMM). The Webinar was divided into two parts. The first part contained an overview of the CESSDA Metadata Office (MDO) Project, the current work, and services of the CESSDA MDO. The second part could be of special interest to anyone working with or being interested in the CESSDA Metadata Model (CMM; https://doi.org/10.5281/zenodo.3543756). It entailed general information about the CESSDA Metadata Model and the changes that have been made between the first published version of CMM (v0.1) and the current published version of CMM (v1.0). Information on how the MDO is trying to facilitate the work with CMM in the future (e.g. by producing DDI profiles) was also presented. Note: This video is also available for viewing on Youtube.