The nature of LinkedIn as a site for business professionals is its main advantage for B2B businesses, compared to other social sites that cater to a more general audience.
Facebook, for one, is full of personal and social updates, while Twitter’s limited messaging capability makes it difficult to look for relevant information about a business and its previous posts. Instagram and Pinterest, on the other hand, are visual-based mediums that would best showcase product photos and videos, specifically in the fashion, lifestyle and tourism sectors.
While there may be more people on other platforms, LinkedIn will give you the best ROI if you’re a business doing business with other businesses.