Meaning of the word "self explanatory" in English

What does "self explanatory" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

self explanatory

US /ˌself ɪkˈsplæn.ə.tɔːr.i/
UK /ˌself ɪkˈsplæn.ə.tər.i/

Adjective

not needing explanation; obvious

Example:
The instructions for assembling the furniture were completely self-explanatory.
The diagram is quite self-explanatory, so I don't think we need to go over it in detail.