Regarding the recording's lyrical message, Caramarcu said: "'Goodbye' is a manifesto [...] and an urge to motivate one another not to give up our dreams," adding: "Say 'goodbye' to all the emotions that keep us on the spot, say 'goodbye' to limitations, conventions and step confident towards the future". During an interview with Wiwibloggs, the band stated that the song also discusses suicidal ideation and overcoming it. Benny Royston of "Metro" noticed "dark undertones of internal battles and breaking away from pain of depression". He compared the message to France, Italy and Israel's "theme[s] of public consciousness" captured in their entries for the Eurovision Song Contest 2018. "Goodbye" was made available for digital download on 12 January 2018 by Roton. A remix created by disc jockey Cristian Eberhard was also released in March 2018.