Hallelujah is a Hebrew expression of praise that became widely known in Western music through the Hallelujah chorus in Handel's Messiah, first performed in 1742. That soaring choral setting shaped how audiences hear the word today, as a shorthand for joy, relief and thanksgiving. Online, editors shortened the idea to a single sung hit that can be dropped over any fortunate moment, and the clip spread through meme videos, reaction edits and soundboards because one second is enough to signal a miracle, a breakthrough or a perfectly timed piece of luck.