Turista literally means "tourist". It's a common word, but Bad Bunny uses it here in a deeply metaphorical and emotional way.
He sings, "En mi vida fuiste turista" (In my life you were a tourist), to describe a lover who only experienced the beautiful, surface-level parts of his life, like a visitor on vacation. They never saw his hidden pain or "heridas" (wounds), making this a powerful metaphor for a shallow relationship.
Bad Bunny compares a past lover to a vacationer who only dropped by for the highlight reel: "En mi vida fuiste turista" (In my life you were a tourist). He looks back on the good parts like "una foto bonita" (a pretty photo), "un atardecer hermoso" (a beautiful sunset), and "una bailadita" (a quick little dance). But a tourist never sees the actual troubles behind the postcard. Bad Bunny hid his long-standing heartache the entire time, admitting: "Escondiéndome los sentimientos / Tengo miedo que me hagan más daño" (Hiding my feelings / I am afraid they will hurt me more).
He holds no grudges, though. He knows a visitor is not responsible for repairing his long-term baggage: "Y no te tocaba a ti curarlas" (And it wasn't your job to heal them). He uses the super casual Puerto Rican phrase "Si se da, pues, se da / Y si no, pues también" (If it happens, well, it happens / And if it doesn't, that's fine too) to shrug off whatever the future holds. It is a smooth, honest track about enjoying fleeting romance while knowing full well that you are keeping your deepest wounds tucked away.