By default, WordPress gives you one editable content area per page. The Other Content allows you to create additional content areas for some or all of your Pages or Posts. You can create as many additional content areas as you like, and call them whatever you want.

The Other Content

By default, WordPress gives you one editable content area per page. The Other Content allows you to create additional content areas for some or all of …

Ben Huson

If you want to spice up your theme layouts this plugin will allow you to show different parts of your content in different area of your theme templates – break out of a single column of content.
More information can be found on the <a href="https://github.com/benhuson/content-parts/wiki" rel="nofollow ugc">Content Parts plugin page</a>.

Content Parts

Divide your post content into parts that you can show in different areas of your theme templates.

The Other Content vs Content Parts