The company where I'm working has Facebook, Twitter and Instagram and is planning on bringing the brand to LinkedIn / YouTube too. However, we are not handling it. Instead, we hired Grow (
www.grow.ae). So basically, we don't do much on it. They are the ones who create and publish the posts, communicate with the fans and create reports. The most interesting one would be Facebook because you can target certain audience on your posts, as what I was told. I'm not sure if we can do it on the other sites though.