hey Guys... If I may ask reviewing Adsense policies T&C I found 3 key points ; Up to three ad units may be displayed on each page. [*]Up to three link units may also be placed on each page. [*]Up to three referral units may be displayed on a page, Ony 2 questions! (if you know the answer to either one, that would be great!) 1) Can anyone explain what the differences between the 3 bullet points above might be...? 2) Does Adsense automatically place ads on my site, or do I make some type of "selection" following their guidelines policies T&C? Thanks Guy(&Gals!)