Universal shorthand for applause, congratulations, or approval — 'well done,' 'bravo,' or celebrating an achievement. It's also become an internet-specific stylistic device: repeating it between each word of a sentence ('YOU 👏 DID 👏 IT') to add dramatic, staccato emphasis, a meme convention that spread widely in the mid-2010s.
Keywords: applause, approval, awesome, clap, congrats, congratulations, excited, good, great, hand, homie, job, nice, prayed, well, yay