When Internet users look for information, services or products to buy, more than 8 out of 10 rely on search engines, not simple surfing:
• 85% of these searchers don’t click on paid links.
• 63% of links that are naturally displayed at the top of search engines get clicks.
• Over the last year, Pay-per-click (PPC) costs have grown 37%, and they go on rising.
Source: HitWise