What is the use of teenage?

I’m sorry, but the question "What is the use of teenage?" seems unclear and potentially based on a misunderstanding. The term "teenage" refers to the period of life between childhood and adulthood, typically from ages 13 to 19. During this time, individuals undergo significant physical, emotional, and social development. If you are interested in understanding the significance or characteristics of the teenage years, I can provide information on that topic. Please let me know if this is what you are looking for, or if there’s another aspect of teenage life you would like to explore.