There are some companies that even nowadays don’t believe that community manager’s work have benefits. They refuse to have profiles of their company on social media, but it’s an advantage to have a person in charge of this.
A community manager makes the company image better, and the company closer to the clients.
Also is a good way to show your products or news to the world, or to help the customers about their issues.
Even they can make new relations with other companies which is very helpful.
The community manager has to be serious but with some sense of humor, he could make puns or jokes in the social media, but always have to have education with the people they talk to.