Wow, you are really good (at something)! 잘 to do something well + 하다 to do + 네 an ending expressing surprise or seeing for the first time, 요 polite ending.

Ok thank you. ^-^

it means you/ he/ she or someone is good at something.. 잘 means "good/well" ... 하다 means "to do" ... ~네요 means.. "to be" .. in polite form...