Social media marketing is a very huge market. There a lots of areas to cover and also lots of info products to sell or affiliate products to promote. For example, you can promote social media manager app or software. You can promote info products like eBook or video tutorials.
You can join this market with this social media marketing blog. It comes with a shopping store with a PLR eBook, a salespage, and beautifully designed theme.
This ready made blog comes pre-installed with necessary WordPress plugins with functions for spam protection, search engine optimization and social media sharing.