[2][3] "Somos Nada" taps into emptiness, the universal theme of vulnerability and inner strength, courage and independence, faith in one's own abilities, taking risks in the face of difficulties.

[12][13] It continues the visual story line that began with "Pa Mis Muchachas" where Aguilera found out her lover and business partner is betraying her, and finishing him off.

Genna Rivieccio of Culled Culture noted that Aguilera portrays a California-style gangster in the video, which itself has Rihanna's "Bitch Better Have My Money" "vibe".

[16] Neil Z. Yeung from AllMusic believed that the "piano-backed ballad sits alongside its most heart-rending siblings on Stripped" [Aguilera's fourth studio album].

[17] Aldo Magallanes of a daily newspaper El Siglo de Torreón called Aguilera's vocal performance "powerful" and noted that it "brings the lyrics to life in a way that only she knows how".

[18] Pip Ellwood-Hughes, a journalist for Entertainment Focus, said the song was "strong" and significantly different from La Fuerza's previous single, "Pa Mis Muchachas".

[20] Writing for NEIU Independent, Enrique Cerros opined that "Aguilera is at her best when she can showcase her mezzo-soprano vocals without heavy, distracting beats", and "'Somos Nada' does exactly that".

[24] In July 2022, Dania González made a cover of the song on the eleventh season of La Voz, a Mexican singing competition television series.