Social media is still relatively new phenomena having about 5 years of age. Strategists find it difficult to put their strategies on paper in black and white, just because of ambiguous understanding of the subject.
Digital marketing include several integrated components like Social Media Marketing, Search Engine Marketing and Display Advertisements. However, one of the key components is content marketing, which falls in almost all of the categories of online marketing. May it be social media or search engine marketing you need to have attractive content to pull audience to your brand.