It only take half an hour to finish the control of adwords' unit price.When the advertisement is online,if you observe the right side of Google,you will find that the key words would fluctuate about every 10 min.For example:Spyware Removal,I bid a minimum price at first then I probably will get a message from ADWORDS that faile to reach the first page.All right, now let's go to the second page of Google search,we find that the first puiler of the second page has not achieved the price prompted by ADWORDS.So we should raise the price to the first page then observe the result in order to modify the price. Sometimes the price information of adwords is fraudulent declaration.For instance: Adwords cost you 5 dollars to put a word in the first page however,only 1 or 2 dollars would be enough actually.