Projects are the fundamental organization unit of GCP. Every resource you create in GCP lives in a project, and users are granted access to projects. https://

Projects are the fundamental organization unit of GCP. Every resource you create in GCP lives in a project, and users are granted access to projects. https://cloud.google.com/resource-manager/docs/creating-managing-projects https://cloud.google.com/resource-manager/docs/creating-mana... "Project-user" here means that access is counted per project. So if you (x@) use GCR for projects A and B, meaning you check in/out code as x@A and x@B, that's two "project-users". Disclaimer: I work for GCP.