單次購買成本 CPP (Cost Per Purchase)就是按照每購買一次產品為單位進行網絡廣告的付費.這種收費方式比較特殊,只在廣告主有特殊需求,或針對某些特殊行銷個案(如在線產品銷售)等時候才被應用起來.相對來說,廣告主廣告費用風險很小,但媒體站點的風險相對比較高.

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