Slambook?

I went through the FAQ thread's main post and the only thing mentioned is that you can make is friends only. But what is it? How do I use it?

Also, is there a better way to search the forums for answers to answer questions? When I used the search feature next to the My forums drop down menu, I just got linked to other people's slambook threads instead of what a slambook is.

Thanks. 😊

Any help please?