Guagua is a fascinating word because it's a regionalism, primarily used in the Canary Islands (where Quevedo is from) and some parts of the Caribbean, to mean "bus".
While most Spanish speakers would use "autobús", Quevedo's use of "guagua" immediately roots the song in his Canarian identity and personal experience, making it a unique and authentic choice that stands out from more common vocabulary.
This intro isn't a song, but a spoken-word piece where Quevedo shares a powerful dream he had ten years ago. It's a vision of the future for musicians from his home, the Canary Islands. He dreamed of a day when local Canarian artists would be everywhere, their music becoming the soundtrack to everyday life.
In his dream, people on the bus are listening to Canarian artists. Their voices are heard blasting from car speakers in parking lots, right alongside famous reggaeton stars. He imagines their music playing on the radio, in the local HiperDino supermarket, and even as the ringtones on mothers' phones. The dream culminates with Canarian artists achieving huge success: earning gold records, hitting number one, and releasing the album of the year. It's a powerful statement about ambition and putting his home, Las Palmas de Gran Canaria (LPGC), on the musical map.