Content Type kind: Section Type

If you create a Content Type with Secrtion Type selected, it means you can create Elements with it. See Theme Structure to see where Sections go in the Plate Nested layout structure. 

Elements are ate the top of the content tree, and fall below Posts. A Section is a (usually) full width part of the page that has a layout of rows, columns and elements inside.

Section Type theme files have the following paths: