This is one of my favorites

Dating website advertisement

She has high-maintenance looks with a down-to-earth attitude, values, and personality. This is one of my favorites.

You see, I've lost my smile. Original, appealing and very well thought out.

You see I'veOriginal appealing and

The demographics should break down the audience into sex, age, income and other identifiers. She's intelligent with her own career and not dependent on someone to support her. They should help give you an idea on what type of profiles get attention and have more people responding to it. Some are targeted for specific interests, such as those targeted to people of a specific lifestyle, religion or hobby.