Google's online payment system (previously known as "Google Wallet" and more recently as "GBuy"), scheduled for launch on June 28, could be a "revolutionary" development for search marketing, according to RBC Capital Markets analyst Jordan Rohan, writes Forbes.com. Because consumers using the payment system would be taken off the merchant's site to complete payment, Google can capture e-commerce transaction data - and therefore develop evermore-precise targeting, according to the analyst.

On its core search results pages, Google would likely designate merchants accepting GBuy as "trusted GBuy merchant" - as a result increasing their click-through rates. Google would also eventually charge 1.5-2 percent for transactions, Rohan believes.