Yes, social media marketing works if it is done the right way. For the fact that Facebook and large user-based sites have people.  Depending on the business you are pushing to the world some platforms are more important than others when using social media to gain traffic and conversions.  Not all business types need it that is why a professional is here to evaluate your business type beforehand.

Social Media Optimization and Management are very important for businesses with customers.  Social Platforms are important so businesses can connect with their customers via inquiries and complaints. Build brand awareness plus attract new customers in the interim.