In for page to be broken into sections, typically there needs to be markup within HTML that can be targeted in the stylesheet for formatting.
However, most content authors don't want to think about techie stuff like div tags, and prefer to work in Visual editor.
Content Sectioner takes advantage of WordPress's content filtering mechanism and makes it easy for developer to insert the necessary sectioning markup auto-magically while allowing content authors to still work as they prefer.
Suppose you're working on site and you want the About page to have in the middle of it with background setting it apart.
You can provide replacement rules that replace insert at the occurrence of match, the occurrence, all remaining occurrences, or all occurrences in the entire piece of content.
You can place HTML before or after match, or replace the match.
In the rare case that something other than tag needs to be matched, you can raw regex instead of tag..
As the developer, you likely would want to let the content authors know that this magic insertion of sections will occur, and what landmarks need to be present in their content to trigger the sectioning..
The instructions will appear at the top of Edit Page page in the admin..
ContentSectioner provide instructions.
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