The most important thing you can do before any interview is research the company thoroughly. Whether it's for a role at NetApp or another company, you always want to know what the company does and how your role contributes to it. For a social media role at NetApp, you'll definitely want to take a look at the company's current social media platforms. For instance, which channels do they post on? What type of content do they post? Which posts are most effective? Is there anything they can improve on?
The more you understand the company's social media presence, the better equipped you'll be when you talk about it during the interview. It shows the interviewers that you really did your homework, and they'll be impressed when you can even mention specific campaigns! When I interned at NetApp, they were most active on Facebook, Twitter, and LinkedIn - start your research there if you're interested.