Social media is interesting in that it can help suppliers gain more traffic at their own branded site -
As most suppliers have an efficient e-commerce engine on their own branded site, positive social media can actually facilitate more transactions.
I know this is a big statement, but it's true. Here's an example that illustrates this.

Let's look at YouTube -- now the world's second largest search engine behind Google with 24 hours of videos being uploaded every minute. It's a site comprised entirely of social media.
One stat that I always find interesting is the number of views a video has had. Typically when I search for a video that someone has shot of, let's say their room the hotel -- it's usually less than 1 minute and averages maybe 2-3 views per day.
Hence over a 6 month period, the video might get 360-540 views -- and that's fairly consistent in that these types of videos typically have views in the hundreds not thousands.
Follow the link to read the entire article:
www.webintravel.com//blog/social-commerce-can-happen-but-do-it-with-respect_1571