In your opinion, what has been the biggest breakthrough in social media marketing as of late?

The interviewer is asking this question because they would like to know that you keep up to date on social media trends. The more you know, the more apparent it is that you have a genuine interest in this industry. To an interviewer, this gives added security that you are in this career for the long term. Discuss a recent change in social media marketing and how you think it will change the face of the marketing industry.