Using the categories in EvolutionX as a way of adding structured blog or article content is a great way to improve the store.  This toggle changes the category behaviour because it's an article.  It allows the article to show even if there are no products or subcategories or if the "hide empty categories" is enabled.

Content Pages, found in the Admin → Marketing area, are great for unstructured content pages.  This means they don't self link within your website.  To get to them you would add a link to a menu, footer, or email typically.  

Examples of unstructured content pages might include:

Category Pages, found in the Admin → Categories area, are great for structured content pages.  These will auto link when nested under a parent categories.  They also allow for an image to represent the page.  This reduces the effort to add a page to a existing area of your website.  

Examples of structured content pages which could be stored as Categories with Article Content include:

Áll categories used as articles should include the Article Content toggle as enabled.  This causes the following changes:

When editing a category enable to Article Content toggle like this: