Four Types Docs
There are four types of documentation:
* learning-oriented tutorials
    - #mw(eg. getting started docs)
* goal-oriented how-to guides
    - #mw(eg. how to publish wordpress using lightsail)
* understanding-oriented discussions
    - #mw(eg. architecture.md)
* information-oriented reference material 
    - #mw(eg. api docs)
Source: Write the Docs
- NOTE: in the image below, 
explanationis equivalent todiscussions 

Image from divio
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