Many internet marketing professional has made this survey and research in their labs then come up with a conclusion "Gossip has a very strong power to increase online sales.

The benefits of word-of-mouth endorsements have always been difficult to calculate. However, a study by Koen Pauwels of the Tuck School of Business at Dartmouth College quantified social networking as 20 times more effective than traditional marketing efforts like print and television. The study concluded that social networking and communities are at least 30 times more effective than media events.
See more details and some other information bellow :
1. Comodo Dragon Security and Privacy Managed Internet Browser
2. Google Plus one (+1) Will Impact SEO - Gogle News
3. The Perfect Title You Might also Want to Know
4. whatch! She Kisses A Boy In Jakarta