I might talk about how old I am, what I look like, and what I do for a living. (I'll try to be truthful!)
I might also include some information about my personal history: where I grew up, where I went to school, various places I've lived. If I have one, I'll include a picture of myself engaging in an activity I enjoy, such as a sport or hobby.
I might describe my job in a little more detail here. I'll write about what I do, what I like best about it, and even some of the frustrations. (A job with frustrations? Hard to believe, huh?)