Musically, "Olsun" marked a significant return to Erener’s 1990s style, moving away from more experimental pop toward a "deeply felt," acoustic sound. Arranged by Emre Kula, the song prioritizes Erener’s powerful, operatic-trained vocals, allowing the raw emotion of the narrative to take center stage. This stylistic choice resonated deeply with the Turkish public, propelling the song to the top 5 of national music charts and securing its place as a modern classic in her discography.

"Olsun" transcends the typical heartbreak ballad by focusing on the strength required to say "let it be." It acknowledges that while one may no longer be "innocent" or "free of lies" following a lost love, there is a certain liberation in leaving the past behind—even leaving "Istanbul" itself—to start anew. By blending traditional Turkish emotionality with modern pop sensibilities, Sertab Erener created a work that continues to offer solace to listeners navigating their own seasons of loss.

The title itself, "Olsun," functions as a rhythmic mantra throughout the track. In Turkish, the term translates to "let it be" or "may it be," signaling a shift from resistance to submission to fate. The lyrics, penned by Can Bonomo, utilize vivid imagery to illustrate this transition. References to cutting one’s hair, drying a rose, and adopting a cat symbolize the small, personal ways individuals reclaim their identity after the dissolution of a relationship. These acts are presented not as defeats, but as necessary rituals of self-consolation.