Valió comes from the verb valer, meaning "to be worth" or "to be valuable". It's a key word in this song because it expresses a sense of unappreciated effort and emotional cost.
In the lyric "Y qué poco te valió el alma mía" (And how little my soul was worth to you), the singer laments that her profound emotional offering, her very soul, was not valued by the other person. This word encapsulates the heartbreak and the core message of the song.
Silvana Estrada spends this whole song walking away. She is crying and wiping her face, she is tired, and she keeps going anyway: "Voy cansada, amor, ya voy cansada / Y aún así avanzo" (I'm tired, love, I'm already tired / And still I move forward). What she keeps asking is small and specific: "¿Dónde estabas, amor, tú dónde estabas / Cuando decía tu nombre?" (Where were you, love, where were you / When I was saying your name?). She was calling him out loud, and he was not there to hear it.
The chorus settles the account in two lines: "Yo te di todo lo que tenía / Y qué poco te valió el alma mía" (I gave you everything I had / And how little my soul was worth to you). What she asks for is stranger than an apology, "Borrarme tu mirada" (to erase your gaze from me), as if the way he used to look at her had left a mark she could scrub off. Then the words stop. The last minute of the song is humming, nothing else, and it lands harder than another verse would have.