Atoms

Atoms is meant to give developers an easy and quick way to add small pieces of content to a site that an administrator can then freely change as they see fit. Of course there are many options for content already like nodes and other entities to fill out a page, but these are usually overkill when just talking about a text in a custom form or similar.

This is what Atoms is for. Very small pieces of content in places where it's usually quite bothersome to embed any other type of content entity.