A person give a minimum bid price to access their advertisment top of 1st page

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Google Adword basic program for website and blog owners to advertise their products,services on internet and they able to give the massage of people about their blogs and websites.In the result they drive traffic their websites and blog.It has little bit confuse process for new advertiser because they have face many problem during their the first compaign, what is the best keyword for their compaign? and give best bid amount to access their advertisement top of first page.