The word 'bien' is an adverb in French. So it tells something about a verb, an adjective, or another adverb. In this case, what the adverb tells is how well someone or something is doing.
very good
It means "quite sad."
I feel good
they are all doing fine
'Je danse bien et je chante bien.' in French, means in English: 'I dance well and [I] sing well.'
de nada. bien dia!
If you mean 'muy bien' - 'very good', or 'very well'
Muy bien literally translates into "very well".However, in Spanish, as in English, people with relaxed grammar skills use the adverb bien (well) interchangeably with the adjective bueno (good). So muy bien may in casual (perhaps less educated) conversation, be loosely translated as "very good".
The correct translation for the English term "I am not in a good mood" to Spanish is "No estoy de buen humor"
"Estoy bien" means "I am well" in English.
bien fait, (ma) fille. "ma" means my.
Tus preguntas es muy bien