Do you think social media customer service has any effect on sales? Why?

Social media is the catalyst to move customer service from efficient reaction to value-creating proactivity

Social media customer service gives you the chance to stand out. Also consider the flip side.

Yes, not only "any", but "many" effects, good ones and bad ones. You go smartly & carefully about providing customer service through social media, and your overal customer satisfaction will rise substantially (in a transparent, easily accessible way to potential customer & other brand promoters). Customer satisfaction will eventually lead to increased sales. To achieve this, don't move your whole customer service activities to social media! Dedicate your Facebook page and Twitter account to general inquiries, the type of which you want the given answers to go online, stay online and go viral to promote your brand. Don't discuss customer-specific or order-specific info online (privacy). Also, don't solve a dispute online (to avoid reputation damage predators from smelling blood)! Use positive customer feedback on social media to frequently unleash direct sales messages (links, coupons, special offers, discounts, free delivery). Be patient.

Yes, social media service does effect your sales. Social media works as a word of mouth in the digital space, so if many of your customers are bad mouthing your product/service, its a cause of concern as nowadays people almost always does research online before shelling out those greens

Yes  because   ;1 Easy  2- safe money  and time 

Of course! If people are satisfied with the way you're efficiently solving problems via social media, they'll come back for sure. 

Customers whether online or in store are more likely to come back to a brand because of the entire shopping experience/personal attention/excellent customer service since there's ample competition on products.

So the happier they are after buying the product, the more likely they are to return to you for a similar product or service.

Definitely Yes. Availability and accessibity are two most essential components of social media customer services which increase brand awareness, brand recognition and loyalty among its consumers

Yes in some areas by bringing in more product awarness, widening its audience, shortening sales cycle, reducing selling cost and over all making it more convenient for buyers.