There is a correlation between satisfaction with a company's social marketing, likelihood to purchase, & perception of the company

"The study finds that social marketing engagements vary by age group. Nearly one-third (39%) of consumers 30-49 years old and 38 percent of those 50 years and older interact with a company in a social marketing engagement context, while only 23 percent of consumers who are 18-29 years old interact with companies. In contrast, 43 percent of consumers who are 18-29 years old use social media for servicing interactions, while 39 percent of consumers who are 30-49 years old use social for servicing needs. Only 18 percent of consumers who are 50 years and older interact with a company via social for a service-related need.
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The study finds a correlation between overall satisfaction with a company's social marketing efforts and consumers' likelihood to purchase and their overall perception of the company. Among highly-satisfied consumers (satisfaction scores of 951 and higher on a 1,000-point scale), 87 percent indicate that the online social interaction with the company "positively impacted" their likelihood to purchase from that company. Conversely, among consumers who are less satisfied (scores less than 500), one in 10 consumers indicate that the interaction "negatively impacted" their likelihood to purchase from the company."

Source:  Press release from JD Power Associates, 14th February 2013