Being Unique is just simply a cool way of saying be yourself. Be don't try to be different or try to be "unique" just be true to who you are. This is something I think people really stuggle with because everyone wants to be someone else. Or everyone is always comparing themselves to others.
When you're yourself, you are unique. When you're like someone else, you are like someone else. Make your own footprint on this world, be someone who does something differently or who doesn't follow the crowd because you don't believe in that. Leave a legacy as you. When you are who you are, and you own it and love it, you will feel a huge weight lifted off your shoulders. Too many people shy away from showing their true colors because they are afraid of not being liked or accepted for who they really are. When I believe it is worse off being accepted for not who you are.
Be unique in a sense that you are honest with yourself. Be unique because it's not the same as everyone else. Be unique because you are amazing just as you. Once you find the courage to own who you are, you will understand it's value. Stop comparing and contrasting yourself to others and start showing others that it's okay to just be yourself.