"Wkwkwk" is an expression that Indonesian use for laughing online such as in chats, forums, etc. I believe this is the abbreviation of "wakaka", the sound of laughing just like "hahaha". This is quite similar with "LOL" or "LMAO". I've seen Mexican use "jajaja", Brazilian use "kkkk", and Thai use "555".

Wkwkwk is same as laugh out loud (Lol), you can use it when you find a funniest moment. Thanks,

in the game of mobile legend, when they die, they say wkwkkwk it means Lmao, Lol, hahaha and 666

It is "haha" in English, "5555" in Thai, "kkkk" in Korean and Portuguese, "jaja" in Spanish. They are laughing expressions commonly used in chatting

Yep, it's just like "LOL", "ROFL", "LMAO"