Retailers Take a Tip from MySpace

E-commerce sites are letting customers post comments, reviews, and even photosand finding out a lot about their products in the process

It has been six months since Macy's opened its Web site to customer comments and reviews, and Peter Sachse, the chairman and chief executive of macys.com, regularly finds himself surprised by what the company is learning from its clientele. The site now gets upward of 350 reviews a day, some full of praise, others with serious concerns.

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