When I started out, I pitched SEO packages to local business owners that I met through networking, which is a good way to start building result-oriented business case studies that show the ROI (return on investment) that has been generated from your efforts. Once you have those and you can prove you consistently get results, you’ll be completely indispensable because nearly every online business succeeds or fails based on the quality of their digital marketing (and people who are really good at it are rare).
Facebook pages are far more detailed than Twitter accounts. They allow a product to provide videos, photos, longer descriptions, and testimonials where followers can comment on the product pages for others to see. Facebook can link back to the product's Twitter page, as well as send out event reminders. As of May 2015, 93% of businesses marketers use Facebook to promote their brand. A study from 2011 attributed 84% of "engagement" or clicks and likes that link back to Facebook advertising. By 2014, Facebook had restricted the content published from business and brand pages. Adjustments in Facebook algorithms have reduced the audience for non-paying business pages (that have at least 500,000 "Likes") from 16% in 2012 down to 2% in February 2014.