Sazón literally translates to "seasoning" or "flavor", the kind you'd add to food to make it delicious.
In this song, Rauw Alejandro uses it metaphorically to describe the unique essence, vibe, and cultural flavor of his homeland. When he sings "Puerto Rico y su sazón," he's celebrating the island's special rhythm and spirit that makes it unlike anywhere else in the world.
Rauw Alejandro's "Pasaporte" is all about living in the moment because, as he says, "Yo sé que todo tiene su final" (I know everything has its end). The song suggests that since nothing lasts forever, we should just focus on the now. It's a philosophy of enjoying life without overthinking, summed up in the line "Sólo nos toca disfrutar hoy" (We just have to enjoy today).
This mindset leads to a life of constant travel and new experiences. Rauw lists all the places he's been, from seeing "Cherry blossoms en Japón" (Cherry blossoms in Japan) to drinking "Un tequila en México" (A tequila in Mexico). He paints a picture of a fast-paced, glamorous life, hanging out in Ibiza with famous DJs and feeling like his life is a movie. The core message is repeated throughout: "Vive el hoy y olvida el ayer" (Live today and forget yesterday).