Social media marketing (also known as digital marketing agency  and e-marketing) is the use of social media—the platforms on which users build social networks and share information—to build a company’s brand, increase sales, and drive website traffic.It can help humanize your company while building trust, loyalty, authority, and recognition. By posting content that shows the people behind your brand as well as real users of your product, you can build brand credibility and trustworthiness.