One of the biggest mistakes in WordPress is storing everything as standard Pages or Posts.
When content has its own purpose, such as Case Studies, Testimonials, Events, Team Members, or FAQs, it should usually be created as a Custom Post Type instead of forcing it into generic content types.
Using Custom Post Types improves content structure, makes editing easier for content managers, and creates cleaner templates for developers.
It also improves scalability, permissions, filtering, search, and long-term maintainability.
Tip: If content needs its own template, archive page, workflow, or reporting, it probably should be a Custom Post Type.