Content marketing is the practice of creating a piece of content (generally digital) that is both useful and valuable to certain members of your target market(s). This piece of content is generally free, though it may be hidden behind a simple email/lead-capture form, and it usually is meant to be found through search or through free/low-budget distribution methods (think social media, low-cost PPC, a small press release). Some might call this permission marketing, the idea being that your target customers have given you permission to market to them by choosing to access your content.Original Source