The goal is to make her want to learn more about you.
90% of profiles feature the same cliche phrases like: "I'm a hard-working guy who is looking for a nice girl." "I enjoy hanging out with my friends." "I'm an easy-going, fun person." DON’T DO THIS!
Although there's nothing inherently wrong with these sentences, you should avoid using them if possible, since so many other people have them on their profile.
Maybe a movie quote, a pick up line or joke referring to one of your hobbies.
Also, writing about trivial things is sometimes effective (if done correctly), because it demonstrates a sense of humor and a non-desperate attitude.
To make things easier, you can do a few things in your profile like stirring up an emotional reaction that will entice her to message you, or including questions for her to answer.