Minecraft was released by Mojang in 2011 and its experience system rewards players for mining ores, defeating mobs, smelting and breeding animals. Collecting glowing experience orbs fills the bar above the hotbar, and reaching the next level triggers this chime while the level number turns green. As Minecraft grew into one of the most watched games on YouTube and Twitch, the sound left the game and became a universal shorthand online for levelling up, earning a reward or making progress in any context.