Desierto literally translates to "desert". While it refers to a dry, barren landscape, it's often used poetically in Spanish to describe a period of hardship or emotional emptiness.
In this song, Nicky Jam uses it as a powerful metaphor, singing, "Yo también pasé por el desierto" (I also went through the desert). He's not talking about a physical place, but a difficult time in his life when he felt lost and didn't know what to do, adding a layer of deep emotion to the lyrics.
Puerto Rican hitmaker Nicky Jam strips away the party beats here to give us an unusually blunt breakup talk. Right off the bat, he drops the English word "Sorry" into his confession: "Sorry si por emociones tomé decisiones" (Sorry if I made decisions based on emotions). He admits that chasing his personal dreams ended up breaking hearts, and he does not pretend he sailed through it untouched. He sings "Yo también pasé por el desierto" (I also went through the desert), using the desert as a metaphor for wandering around completely lost and clueless after a split.
The chorus hits like a reality check from a friend who refuses to sugarcoat the truth. He chants "Todo lo que empieza, algún día acaba" (Everything that starts, ends someday) and "Todo lo que sube siempre baja" (Whatever goes up always comes down). It is almost funny how brutally practical he gets when he declares "El amor es idiota, el amor es así" (Love is idiot, love is like that). Yet in the middle of all that cynicism, he drops a genuinely sweet piece of advice: "Quiero que te quieras aunque no me quieras" (I want you to love yourself even if you don't love me). He tells his ex to put herself first, trust time rather than people, and wait for winter to turn into spring.