By default the URL structure of a post is: post type / post title
The way to customize this structure is by navigating to Settings >> Advanced Settings and searching for the advanced setting:
Post URL Structure
System Variable: post_url_structure
To add a new value select the plus sign next to the variable name:
To modify the structure of the URL drag and drop each variable to the desired place:
Once the Post URL structure is customized, click Save to update this for all new members that register to the site.
**Important Note: The changes will be reflected on new posts and in older posts that have been re-saved the information.