AdWords is Google’s main advertising product and main source of revenue. Google’s total advertising revenues were USD$28 billion in 2010. AdWords offers pay-per-click (PPC) advertising, cost-per-thousand (CPM) advertising, and site-targeted advertising for text, banner, and rich-media ads. The AdWords program includes local, national, and international distribution. Google’s text advertisements are short, consisting of one headline and two additional text lines. Image ads can be one of several different Interactive Advertising Bureau (IAB) standard sizes.
On Google the adverts are displayed either at the very top of the search results with an orange background, on the right hand side or in both these places. In a PPC contract advertisers pay Google each time someone clicks on their advert. Many pay per click providers exist, Google AdWords, Yahoo! Search Marketing, and Microsoft adCenter are the three largest operators.
The Daily Omnivore 
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