What is the difference between creating a page through the Navigation vs. creating one in the Finder?

The Navigation editor creates sections and section landing pages. Pages created as Section landing pages will show up in the Navigation tree structure and can be linked using Navigation widgets. These are managed links and will be updated when the section is moved. In contrast, pages created in the Finder editor will not appear in Navigation widgets. Regular pages must be linked manually in rich-text or using an Auto-list widget.

A real-world example would be a Press Releases section. The Press Releases section would be created in the Navigation editor so it can be linked in a top nav. Your Press Releases pages, however, would be created as standard pages in Finder because you would not want each press release showing in a Navigation drop down. Instead, a “Latest Press Release” list could be used on the Press Releases landing page using an Auto-list.