That’s the percentage growth in unique visitor numbers to Pinterest from September to December 2011.
There’s a bit of buzz around the site at the moment, led by Pete Cashmore’s article for CNN.
It’s a content curation social media network, or “online pinboard” as it calls itself, for sharing things you like on the internet.
Brands are getting involved, too. Have a look at Whole Foods Market’s pinboards on Pinterest.
Apparently, it drives “more visitors to third-party websites than Google+, YouTube and LinkedIn combined” (Pete Cashmore’s article). (In the last month, 70 people have come through to this blog via Pinterest)