Content marketing focuses on the tactics and execution—the actual creation, curation, and editing of content that's specifically created for the purposes of marketing. This could be anything from blog posts to the confirmation page, and is aimed at building a trusted connection between a company's products or services and the market that might end up purchasing them. It's about creating content that people not only want to consume, but that will also help them through the sales funnel.
Of course, generating revenue is a key goal for many marketers, and content marketing can be a powerful driver. When you build an audience that trusts you and wants to hear from you, they are more likely to purchase your products. For instance, CMI subscribers are more likely to take advantage of CMI paid offerings such as attending Content Marketing World than non-subscribers.
The reality is that just creating content isn’t enough. In many cases, you need to amplify it. You need to market your marketing. This is where social media can help a great deal. Also recognize the many places (and many people: customers, employees, influencers) that can help you amplify your content marketing. (bonus: presentation on the difference between influencers and advocates)