A cloud administrator can work with storage resources and their capabilities, which are discovered through Cloud Assembly data collection from associated cloud accounts.
Storage resource capabilities are exposed through tags that typically originate at the source cloud account. A cloud administrator can choose to apply additional tags directly to storage resources though, using Cloud Assembly. The additional tags might label a specific capability for matching purposes at provisioning time.
Capabilities on storage resources become visible as part of the definition of a Cloud Assembly storage policy. The storage policy itself might also be tagged with its own layer of capabilities. The cloud administrator then adds storage policies to storage profiles. See What are Storage Profiles.