Google AdWords is Google’s main advertising product and main source of revenue. Google’s total advertising revenues were USD$42.5 billion in 2012. AdWords offers pay-per-click, that is, cost-per-click (CPC) advertising, cost-per-thousand-impressions or cost-per-mille (CPM) advertising, and site-targeted advertising for text, banner, and rich-media ads. The AdWords program includes local, national, and international distribution.