el bien (adjective, adverb, interjection, noun)

Frequency star
  1. well, properly, correctly
  2. good, right, fine (in expressions of approval)
  3. very, quite (used as an intensifier, e.g. “bien caro”)
  4. good, benefit, wellbeing (as a noun)

cocinar bien.

I know how to cook well.

Decidiste bien, yo.

You decided well, I think.

Supiste guardar el secreto muy bien.

You knew how to keep the secret very well.

Espero que estés bien.

I hope you're well.

Harías bien en escuchar su consejo.

You would do well to listen to their advice.