OP word is generally used in some cases of conversation, Many people does’nt knows what OP means ? OP is generally uses for OverPower word while gaming for who is playing amazing or aggressive. And on reddit when someone post Original Poster (That post created by himself or herself).
Example – Once my post is getting popular on reddit when someone comment on my article “The author of this article is OP“. When I did not even know about OP.
Sometimes OP also used in memes for just fun to aim a guy is doing something or anything else.