In my opinion, the teenage years are the most important years of our life because it is the phase in which you develop completely and you are able to find meaning to many situations.
Also, personally I think that you live and you face new situations that make you think things throught. It is a phase of new situations, sensations and emotions to overcome and especially, I strongly believe which is a phase of selfknowledge, to know yourself more and be clear about what you want ti choose.
Without a doubt, the teenage years is a phase in which you discover many things, you learn new lessons that you will remeber forever and that makes you be brave.
Finally and most important, you will end up learning who are your true friends, who loves you, who supports you, who helps you and most important still, you will know who you are and who do you want to be.