This infographic from Blogmost offers numerous ways to share content through social media - way beyond just Google Plus, Facebook, and Twitter. But this infographic implies a key difference between content marketing and SEO strategy.
SEO, to a certain extend, is about directing content to various platforms, sometimes with a message that includes an offer or reference to your business, product, or service. Content marketing also includes curation of other media, all for the purpose of being helpful to your potential customers. Thus an offer or reference to your business, product, or service is not included.
That difference should be kept in mind as your business develops content to be offered on the platforms listed below.
In the meantime, enjoy the infographic!