Trafico comes from the verb traficar, meaning "to traffic" or "to deal" (often in illicit goods). It's an intriguing word because it immediately suggests a world of illicit activities.
In the song, Maikel Delacalle sings, "Ahora con la música es que trafico" (Now it's with music that I traffic/deal). He uses this word metaphorically to say that he's now dealing in music, implying that his music is so powerful and pervasive that it's like a commodity he's distributing widely, much like a dealer would. This clever wordplay makes it memorable and unique.
"Room 302" is a boastful trap-reggaeton track built around one wild night that becomes a running symbol of everything since. Maikel Delacalle opens with a party encounter: a girl catches his eye, they exchange numbers, and the room number "302" turns into the song's hook and its recurring punchline.
From there the verses turn into a flex: fast cars, fast money, and wordplay comparing his own production alias "Blackthoven" to Beethoven. The song closes by returning to that same room number, this time as a shared memory from a night in Tenerife, showing how one moment turned into a lasting inside joke and a marker of how far he's come.