What is performance?

I'm going to open up slightly here. To me performance is a nerve racking experience. However, once it is all finished with, you get this sense of achievement and adrenaline. On stage, I feel this rush and when the audience react, you know that they are sharing this experience with you. So yeah, it is a mixture of different elements, which come together beautifully and you can look back and say "I did this, and I'm glad I did it instead of being scared and refuse to go on stage!"