Sorry Wikipedia - I love you to bits but this is JUST PLAIN WRONG. IMHO, Social Selling isn't a return to relationship selling.
Social selling is a mechanism to create a professional profile, a public brand, an opinion. Clients don't want to buy product - they want education / challenging / to learn from the salesperson.
Please please please - don't think social selling is just connections - it's about being a leader and having followers ;-)
Social selling is the process of developing relationships as part of the sales process. Today this often takes place via social networks such as LinkedIn, Twitter, Facebook, and Pinterest, but can take place either online or offline. Examples of social selling techniques include sharing relevant content, interacting directly with potential buyers and customers, personal branding, and social listening.