Pros
Like everyone says, the people. You can make lifelong friendships here but it's probably due to trauma bonding (see cons). You will get great experience and there is an opportunity to learn around every corner. For someone starting out in their career in social media, it is extremely valuable to set you up for next steps. But at what cost?
Cons
My mental health was the worst it's ever been while I worked here. And I was not alone in that. The workload and expectations are insane. I worked a 6 day week usually to try to compensate for my workload, and this is not a problem I've ever had in any other job before or after this. The salary also is not competitive for industry standard, especially for New York and for how much they expect of you. They definitely try to compensate for this with Summer Fridays, etc. but it's a weak distraction, not a fair trade.