Answer:
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
We applaud if you perform well.
I can generate fear and some say I come out of your ears. I am as quiet as a mouse but not welcomed in the house.
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
If you have me you want to share me. If you share me you don't have me. What am I?
What language does a billboard speak?