Traición means "betrayal". It's a powerful and dramatic word that perfectly captures the passionate and tense theme of this song about infidelity.
Throughout the track, the artists repeat the line "Las traiciones se pagan con otra traición también" (Betrayals are paid for with another betrayal too). This word is the key to understanding the song's core message of a tangled relationship built on cheating and revenge.
This song is a conversation between two people who are cheating on their partners... with each other! KAROL G starts by telling her lover, "Baby, tú tienes marido y yo me enredé en tu piel" (Baby, you have a husband and I got tangled in your skin). Anuel AA sings the same line back to her, but about her having a girlfriend. They both know their actions are wrong, but they don't seem to care too much.
The main idea is that revenge is the best medicine for a broken heart. They both sing the line, "Las traiciones se pagan con otra traición también" (Betrayals are paid with another betrayal too). Their logic is simple: their partners cheated on them first, so it's only fair that they cheat back. It's a pretty cynical take on relationships, with Anuel AA claiming, "No te cambian por algo mejor, te cambian por algo más rico" (They don't trade you for someone better, they trade you for someone tastier). In the end, they decide they don't even believe in love, but they definitely enjoy each other's company.