Content types and taxonomy are all part of a site's content model. A content model defines all the content types, metadata, and relationships between different content on a site.
Structural content strategy supports content goals through the appropriate use of structure to improve the user and authoring experience, and to support business goals.
One thing that's been around for a while but is rarely taken advantage of but can be liberating. When we explain the concept to clients, they typically respond with, "Yes, that's what we need. That's what we've been waiting for. Where have you been all my life? You had me at hello!!"