If you activate your search, you'll create part of your profile yourself: Your pictures and some basic information like job, age, etc.
The rest is filled in by your friends, who answer questions about you. This automatically generates character traits on your profile. However, for some questions, friends can also provide text answers, which will also appear on your profile.
But you can always decide what should or shouldn't be on your profile. If something doesn't fit, you can remove it at any time.