To a marketer, the greatest promise of social media lies in its ability to build relationships and do it at a scale and pace that wasn’t conceivable prior to the digital age. Still, the time-tested principles for creating and deepening relationships offline apply equally online. A relationship is a relationship.Digital marketing expert Gary Vavnerchuk confirms this, when he says that “developing relationships through social media requires the same key components that you would want in any good relationship – trust, respect and connection.”At its core, this is what social media’s 80/20 rule is all about.Let’s look at two different ways the 80/20 rule has been defined and examine the Glue rule that may supersede them both. 1. The 80/20 rule of content This long-standing guidance advocates that, for a marketer, at least 80% of your posts should educate or entertain, while no more than 20% should promote you or your…