The information collected during the sign up process (First name and last initial, gender, age range, date joined, and location) are visible to all Curatio members by default. Other than this information, it is up to you to decide what you want to share.
You have to choice to share any of your posts to only your circle or to the whole community. The interests & experience tags you share as well as your story will be visible to the whole community. This is to help people find others with similar stories and interests to add to their circle.