The Privacy setting default is to “private” which means that the only people who can your “your stuff” are your “Friends”. Remember no-one other than you can see “Your Secret Stuff”
You can change your Privacy Setting to “Public”, but this means that anyone who locates you will be able to see “Your stuff” (although again no-one will be able to see “Your Secret Stuff”). If you are a trend setter it might be that you prefer to have a “Public” setting. The choice is yours.