Your social media specialist will be responsible for devising and executing campaigns, so you want to get some insight into how they approach their work. Great candidates should be able to articulate the problem they were trying to address, how they set goals, what tactics they used, and how they measured their results. It’s not necessary that the campaign was a smashing success, as long as the professional approached it in a deliberate way while gaining insights that helped them develop better campaigns in the future.