Goteras literally translates to "leaks" or "drips," often referring to water leaks from a ceiling. It's an everyday word, but its use here is quite creative and unexpected.
In the song, Quevedo sings, "la vecina de abajo tiene goteras de tantas lágrimas" (the downstairs neighbor has leaks from so many tears). He uses this common word in a hyperbolic and poetic way to express the immense sadness and tears he's shed since his lover left, making his sorrow so profound it's affecting others.
In "CUÉNTALE," Quevedo sings directly to a former lover who is now with someone new. He challenges her to tell her new partner everything about their past relationship, from their intense passion ("lo que en la cama tú y yo hacíamos" - what you and I did in bed) to the deep sadness of their separation ("el dolor de cuando nos despedíamos" - the pain of when we said goodbye). It's a song filled with the raw emotion of a difficult breakup, where the singer is convinced that what they shared was unforgettable.
Even though he tries to move on, he admits that no one else compares to her and that even fame feels empty without her. He uses powerful imagery to describe his sorrow, like crying so much that his tears leak through the floor to the apartment below. The song captures that feeling of being haunted by a past love, where every attempt to turn the page fails because he believes their chapter isn't truly over.