The 'seal clap' meme (zzal), which shows a seal clapping with its flippers, is famous. Because of this, the emoji is often used as a cheerful symbol to express enthusiastic agreement, praise or joy.

In Korea, clapping uncontrollably with joy is called a 'seal clap' (mulgaebaksu). This emoji brings that very image to mind. Sending this emoji when you're delighted with something or genuinely happy about a friend's good news will effectively convey your feelings.