What does OMG stand for?

 OMG stands for Oh My God.

 Why Say OMG? 

 OMG is basically an exclamation and also an expression most people use when something happens like disbelief, unexpected moment, and surprising moment as well. And the word OMG is used widely.
OMG- OMG stands for Oh My God.

  of the time people use this word while chatting on Instagram, Facebook, or other social media, and they say Oh My God. Which shows any unbelievable situation and unexcepted things which communication. 

This Word OMG is Actually the Short form of Oh My God so people use it as a short form.