When you work with the company that does social media management you will understand why it's better than working with a freelancer that doesn't know very much about what they're doing. A company has a lot of capital behind it so if they make a mistake they are going to fix it for free or generally won't charge you a lot of money for the problem being fixed. You need to be careful about who you are because you don't want to hire someone that may mess up your site and then not do anything to repair it.