This is the 29th most frequent French word.
bien
"Bien" means "well" or "good" in English, depending on context.
Here, 'bien' is used as an adverb describing the state of feeling.
Je me sens bien aujourd'hui.
I feel well today.
Here, 'bien' is used as an adverb describing the manner of the action 'chante' (sings).
Elle chante bien pour son âge.
She sings well for her age.
Here, 'bien' is used as an adjective to express approval or a moderate positive opinion.