This is very usefull parameter if you operate TGP site. First clicks means that if surfers clicks on a link with content

for example, out.php?url=http://gallery.com/post.html

and this is his first click on your site - script always sends him to content..

There are several ways to setup this option

1. link out.php?url=somethings&fc=1. Note fc=1 parameter.
2. Settings/ CJ Settings - Default First click , first click by default for everything
3. Personal settings for each trader (personal first click (Edit traders))
4. Personal Trade Scheme Edit traders