In what we might simply term the power of G, Google's Larry Page says the Google+ social networking site has reached 10 million users in 2 weeks. And those users are sharing 1 billion items per day. That didn't take long. While it is of course too early to say what the impact of activity is for brands, but marketers are now trying to figure out how to best operate in Google+. We expect they will apply lessons learned from other online spaces, Facebook and Twitter in particular. AdAge 's Irina Slutsky writes about the potential opportunities that Google+ may provide. And the big advantage comes with the data Google already has on consumer behavior. Slutsky writes: Building out brands on Facebook has turned into big business -- costing up to tens of thousands of dollars a month -- and if Google has its way, companies such as Buddy Media, Vitrue, Blinq MEdia, WildFire, 22squared and many others could be adding Google+ optimization to their offerings. "We're seeing Google+ as a strong competitor in social media from an advertising opportunity," said David Williams, CEO of Blinq Media. "The brand pages need to roll out, an ad model needs to develop, and we want to take advantage of all Google+ has to offer." Mr. Williams, who works with brands including Baskin Robbins and Mentos, says that because Google has expertise in search, what has always been true for Google and Facebook remains: While Facebook knows who you are, Google knows what you want. That difference could be a major advantage when it comes to advertising. "Facebook has interest data, but not intent data," Mr. Williams said. "Google will have a tremendous amount of intent data that could allow them to create a better ad model for social than Facebook -- a very, very powerful ad model." Read Marketers Intrigued by Google+ but Questions Abound here .