The Master System was SEGA's 8-bit home console, released internationally in the mid 1980s after its Japanese launch as the Mark III. This startup sound is associated with the overseas models, where turning the system on brought up the SEGA screen accompanied by this short tune, often identified in rips as the Sega Tune. As retro collecting and emulation grew online, the clip was shared as a standalone reminder of that boot sequence. It remains popular because those few notes instantly place a video in classic SEGA territory without needing any explanation.