Revenues – Google reported revenues of $6.77 billion in the first quarter of 2010, representing a 23% increase over first quarter 2009 revenues of $5.51 billion. Google reports its revenues, consistent with GAAP, on a gross basis without deducting TAC.
Paid Clicks – Aggregate paid clicks, which include clicks related to ads served on Google sites and the sites of our AdSense partners, increased approximately 15% over the first quarter of 2009 and increased approximately 5% over the fourth quarter of 2009.
Cost-Per-Click – Average cost-per-click, which includes clicks related to ads served on Google sites and the sites of our AdSense partners, increased approximately 7% over the first quarter of 2009 and decreased approximately 4% over the fourth quarter of 2009.
TAC - Traffic Acquisition Costs, the portion of revenues shared with Google’s partners, increased to $1.71 billion in the first quarter of 2010, compared to TAC of $1.44 billion in the first quarter of 2009. TAC as a percentage of advertising revenues was 26% in the first quarter of 2010, compared to 27% in the first quarter of 2009.