What does マニュアル mean?
マニュアル is a Japanese noun meaning “(instruction) manual” in English. It is written as マニュアル in hiragana, and manyuaru in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
君もこの手の仕事は初めてなんだろう？勝手がわかるまではマニュアル通りにやっておいたほうがいいよ。
It's your first time doing this kind of work. You should follow the manual exactly until you get more experience.