Explanations
You should use the Explanations folder to give in-depth explanations on any topic that's relevant to your project.
Single Responsibility Principle
Similar to the SOLID principles, you should try to adhere to the Single Responsibility Principle when writing explanations. Each article should address a single topic, and any sub-topics if relevant. If you need to touch on a different subject while doing so, you should add a link to that subjects explanation, rather than fully explain it.
The main topic should be the first header in the article, and any subtopics (or even a subtopic's subtopic) should follow hierarchically by using the appropriate header tag level.
Related How Tos And Tutorials
Your explanation articles will probably relate to one or more How Tos or tutorials. Please make sure to list them in the article, so the user can have a hands-on experience while learning the concepts, or visit them afterwards.