While dancing?? It means "enjoy it" "feel the music and have fun!" but, seriously, some context would be really great here... :)

This is slang or figurative language. Groove is not a slang word but the expression "find your groove" is. It could refer to dancing but it usually refers to tasks. At work, you find your groove when you are very focused and productive. When everything comes together mentally and physically. There is a rhythm to what you do.

It means trying to find a balance in life. This suggests attempting to balance the good with the bad; the easy with the difficult; needs with wants.

Thanks Jennifer :) I really appreciate your answer! And thanks for telling me to add a context :)

Well, Susan said it ! In this case "to find your groove" means to find what you are comfortable doing, your passion, what you want to do. ^^