Using CPT’s within WordPress can help the Admin (or Editors) easily create new content with very limited WordPress knowledge. This video example will help you visualize just how easy creating new content with custom fields on a post within WordPress is.
Visualization of a CPT (Post) Example
Custom Fields in WordPress
WordPress has the ability to allow post authors to assign custom fields to a post. This arbitrary extra information is known as meta-data.
WordPress Custom Post Types
View the WordPress Codex for technical details on Custom Posts Types within WordPress.