Pregones literally translates to "proclamations" or "street cries," like those of a town crier or street vendor. This is a special word you won't find in a typical Spanish textbook!
In Salsa music, a pregón is an improvised vocal line that the singer calls out, often during an instrumental break. When the singer boasts, "Hoy te dedico mis mejores pregones" (Today I dedicate my best 'pregones' to you), he's proudly offering the very best of his artistic soul and talent.
This song is a classic for a reason! It's all about the double life of a famous singer. On stage, he's the life of the party, telling the audience, "vinieron a divertirse / Y pagaron en la puerta" (you came to have fun / and you paid at the door). His job is to make everyone forget their problems and celebrate. He sings about the good and the bad, "de risas y penas" (of laughter and sorrows), because that's what the people paid to hear.
But off stage, it's a different story. People see him in the street and assume his life is perfect, full of parties and women. He points out that "nadie pregunta si sufro, si lloro" (nobody asks if I suffer, if I cry). It's a lonely feeling. He explains that when the show is over, "soy otro humano cualquiera" (I'm just another human being). The song is a powerful look behind the curtain of fame, showing the real person behind the performer.