One of the most significant turning points in the history of WordPress is when version 3.0 came out in 2010. It included Custom Post Types, which allowed a developer to create entirely new kinds of content, manage how the administrative interface looked, and create unique templates for rendering the content on the front of the website.
A great, albeit simple, example of this is a Staff Listing. If you think about what a staff listing needs, it includes:
A page listing all of the staff (or a page with pagination if there are too many)
A single page for each staff person, with relevant data like phone number, office location, email address, etc.
The ability to organize staff into groups, like departments, locations, etc.
A combination of a custom post type, meta fields, and custom taxonomies can create these pages, plus the administrative interface, in 30 minutes or less. Here’s how I did it.