Just give a small explanation of who you are: how you're here and what you do!
example:
I'm denty, i'm from sheffield (steel city) and i'm a student at 6th form. My intrests are a wide variety of sports, (i play quite a few, albeit badly), cars, games (obviously), quizzes, and photography.
I'm here because i like gaming. and i got bored of just playing on my own and liked to play with people and eventually actually got good (though getting carried makes me smile a bit)
obviosuly im some sort of megalomanic and want to take over the world,
due to me putting a lot of time in doing this and micromanaging everything. being somewhat of a perfectionist helps too.
also, any questions you have for me i'll be happy to answer.