What doe it means when a song goes oldie?

A song becomes an "oldie" when it is considered to be from a past era and is no longer considered current or contemporary. The specific timeframe that defines an oldie can vary, but it generally refers to music that is at least a few decades old and has stood the test of time, maintaining popularity or cultural significance even after its initial release. Oldies songs are often associated with nostalgia and are frequently played on radio stations dedicated to classic music or oldies hits.