Alibaba Group announced the official launch of Alimama, an online advertising exchange which allows web publishers and advertisers to trade online advertising inventory. A wholly owned subsidiary of Alibaba Group, Alimama has emerged from its 100-day beta period as China’s largest online advertising exchange platform and well positioned to help small- and medium- sized web publishers monetize the estimated 80% of web site traffic which goes unmonetized in China.

Since launching the beta version of the marketplace on August 10, Alimama has already signed up more than 150,000 small- and medium- sized web publishers and 135,000 personal blogs, covering more than 1 billion page views per day. The exchange has over one million registered users with an inventory of more than 380,000 advertisement positions available for purchase, with transactions for more than 20,000 advertisement positions occurring each day. Alimama continues to grow at a rapid rate, adding 4,000 small and medium sized websites and 10,000 personal blogs each day.