What Is The Meaning Of Club In Common? And Why Does I Only Can See It In Other Fan Page?

It means..that you and other fanpop users like the same things so there in the club too, and you only see it on other users page not on you're page cuz it tells you what clubs you have the same as the user whom you're visiting their profile..if you don't get it just wait for more explanations

it'd called CLUBS IN COMMON what do why think it means?

Like someone else said, it shows the clubs that other people have joined that you have also joined.

It's a way of seeing if you have common interests with another user. ^^