Identity is your distinguishing character or personality. If you want to be known as a cat person, talk about cats. Want to be known as someone to avoid, only talk about the negatives. Want to be known as a jerk, be a jerk. Want to inspire, encourage others.
Your identity is how others see you, but through your words and actions, you can control the narrative. Now the hard part is stepping outside yourself and figuring out how the world sees you.