“The sales information that advertisers receive is anonymous,” said Baser. "You would see the number of people who bought shoes, using the example of an online shoe retailer. But marketers would not be able to get information that could identify the people,” he added.

How is it going to clash with Google? Here is the answer from Debra Aho Williamson, an analyst with research firm eMarketer who replied to BI: "’the path to purchase’ is not as direct on Facebook as it is on Google's search engine.  But providing information about customer sales conversion should help Facebook make a stronger case to online retailers. It lets marketers track the impact of a Facebook ad hours or days or even a week beyond when someone might have viewed the ad," said Williamson. "That allows marketers to understand the impact of the Facebook ad on the ultimate purchase."

According to Business Insider, the new Facebook product "closes the loop" on brand advertising in a way that no site besides Facebook is able. The reason is data- huge chunks of user data with the social network. Adding to it, Facebook already has lot of brand advertisers on board, and millions of people looking at these advertisements in the social network, which neither Google nor Yahoo has.