[1] The single was written by Loreen alongside British production team TMS, Boy Matthews, Conor Blake and Zhone, with the latter also producing the song with Billen Ted.

[2] The song places emphasis on Loreen's vocals, set over progressively louder-growing production instrumentation.

[3] Loreen made history at the Eurovision Song Contest 2023 in Liverpool after her entry "Tattoo" went on to win the contest with 583 points, earning Sweden its seventh Eurovision win and making Loreen the first woman and the second performer to have won the competition twice.

[7] Upon speaking about her new record, Loreen was looking to create a follow-up to 2012's Heal and with "Tattoo" being the first part of the book, "Forever" serving as the second chapter.

[8] Loreen conceived the songs first harmonies by singing by a piano, and once a pattern is formed, "A free start from beginning to end.

[9] Loreen stated that she does not care about what the music industry expects from her, she said this leads to people being "unhappy" and results in "a big price".

[10] In order to promote the single, Loreen promoted the single by performing at the Eurovision Song Contest 2024 in Malmö, Sweden, where she was the reigning winner, performing a medley of "Forever" and previous year winner "Tattoo".