"Ego" was originally written by Tim Larsson and its producers Gavin Jones, Tobias Lundgren and Johan Fransson.

In an interview with Billboard Argentina, the singer stated: "it means a lot to me to be able to talk about other people's ego and oneself's; how does that affect our way of living, how it turns into an attack".

[2] While reviewing the album Soy, Santiago Torres from Billboard Argentina described the song as "a ballad with thoughtful, complex and orchestral arrangements" and also praised Espósito's "outstanding vocal performance".

[5][6] Additionally, the song peaked at number 15 on the Argentina Latin Airplay chart, also provided by Monitor Latino.

The video ends with a message from Lali that says "Although the world agonizes for pride, greed and ego, there's always a bridge to where love, truth and light reign.

In Clarín.com, the performance was compared to previous ones by Madonna, Jennifer Lopez and Britney Spears, writing: "[Lali] surprised everyone with her outstanding figure, her live choreographies and her imprint at the moment of hitting one of the most important stages of the Corrientes Avenue.