Which Social Media Sites are Proficient for Business Purposes

To answer the question of which social media site is most suited for business versus pleasure seems highly due to which type of company an individual owns. For a animal rescue nonprofit organization, Facebook would be more suited than Instagram, as there are more opportunities to post events/posts on Facebook that would grab the media's attention. But for lets say a festival clothing line, whose main crowd are individuals that are eccentric and visionary, Instagram may be a more suited platform of advertisement.

The social media platform I personally haven't had much experience with on a business level would be Twitter, as I do not really know how professional one can sound on that site. Pinterest and Tumblr are two other social media platforms that I have not seen much use for in regards to business, although Pinterest may be superb for a visionary profession.