Songfacts®:

• Here, Karol G sizes up her life and career. They doubted the country girl from Colombia but she overcame adversity and soared as a global sensation. She proclaims her pride for the money she's earned and the boss status she holds in the music game.
• What's the deal with the song title? "S91" is a shoutout to Psalm 91 of the Bible (The "S" stands for "Salmo," which is "Psalm" in Spanish). The Psalm itself testifies to the writer's faith in the Almighty God as his protector to keep them safe from harm.
• Karol G ends the song with a quote from Psalm 91:
  
  No tengan miedo a los peligros nocturnos
  Ni a las plagas que llegan con la oscuridad
  Pues mil caerán a tu derecha y diez mil a tu izquierda
  Pero a ti, nada te pasará
  
  Translates as:
  You will not fear the terror of night
  Nor the pestilence that stalks in the darkness
  A thousand may fall at your side, ten thousand at your right hand
  But it will not come near you
• "S91" was released on July 13, 2023, through Bichota Records and Interscope Records. Shortly before dropping the single, Karol G told her fans she wanted to give them a gift, a song showing her gratitude to God. She launched it on July 13 because 13 is her favorite number spiritually.
• Just before dropping "S91," Karol posted to TikTok a video of her mom breaking down in tears over the song.
  
  "This video is special for many reasons," Karol G wrote in the caption. "One, there is no more beautiful feeling for me than knowing that my family is proud of me and that my music can cause them reactions like that. Two, my mom took us to school and taught us to pray Psalm 91 after leaving home every day in the morning because she said they were sacred words of protection, and three, I am grateful to God and to life for giving me a family that supports me, that has believed in me from the very beginning and that is still with me today, celebrating together so many beautiful things that happen to us."
• Karol G co-penned "S91" with her regular songwriting partner Keityn and her go-to producer Ovy On The Drums. Keityn and Ovy's other collaborations with Karol G include "Tusa," "Cairo" and "TQG."
• "S91" is the lead single from Mañana Será Bonito (Bichota Season). The album is a companion piece to her fourth studio album, Mañana Será Bonito, and "Bichota," a 2020 reggaeton single from her third studio album, KG0516.
  
  The name of Karol G's Mañana Será Bonito album represents a specific phase of her life when nothing felt great. She kept repeating the album title "tomorrow is going to be beautiful" as a reminder that even though things were tough right now, tomorrow would be a new day.
  
  "Bichota" is linked to the Puerto Rican slang bichote, deriving from the English term "big shot." Explaining the meaning of the term "bichota" when she dropped the song of the same name, Karol G told Billboard: "[It's] a moment of feeling sexy, flirtatious, daring, strong, empowered, and to a certain extent, it translates into personal motivation and self-confidence."