Social Media:

Social Media Advertising (SMA) in simple plain words means advertising via social media. Have you ever seen the ads that appear on Facebook, Twitter, LinkedIn, YouTube and other social media sites that are promoting any brand, product or service. These ads are served by social media advertising platforms whereadvertisers pay money for showing their ads on social media network pages which are based on various payment models.
Social Media Advertising (SMA) = Activities That Bring Paid Traffic From Social Media.
Social Media Advertising (SMA) is the process of increasing the visibility of a website by placing the website’s ads on the social media network pages which in turn increases the traffic generated from these ads. Since you need to pay money to the social media networks for placing these ads and that’s why the traffic generated from these ads is called paid social traffic.

Social Media Advertising (SMA) = Paid Social = Sponsored Social
So social media advertising can be defined as the science and art of getting paid targeted traffic to your website from Facebook, Twitter, LinkedIn or other social media networks by utilizing the advertising platform of social media networks. Social Media Advertising (SMA) is an important part of SMM as well.