pues (adverb, conjunction, interjection)

Frequency star
  1. well, so, then (used as a filler or discourse marker)
  2. since, because (introducing a reason)
  3. then, in that case (as a conclusion or response)

No tengo hambre, pues ya comí un bocadillo enorme.

I'm not hungry, since I already ate a huge sandwich.

¿No quieres venir? Pues me voy solo al concierto.

You don't want to come? Then I'll go to the concert alone.

Pues no qué decirte, la verdad.

Well, I don't really know what to tell you.