This document discusses domain modeling as a way to organize information architecture (IA) and content strategy work. It explains that a domain model captures the overall context and relationships of concepts within a subject area, independent of any interface, to establish a shared understanding. This informs subsequent models like content models, which describe required properties for each concept, and taxonomies. Domain modeling helps ensure all content fits together cohesively, allows for flexibility across sites and devices, and promotes stakeholder alignment. The presentation encourages information architects to lead domain modeling activities early in projects to guide downstream work.