For example, there are laws that restrict defamation, incitement to violence and guarantee the right of reply. They can't put false information out, like "The president of X has said Y", or use a cooked up image as real. They have to keep secret the names of minors when they are involved in police-related stories, they are required not to divulge privileged (state secrets) or private information, such as was the case with Gawker. All of these have their exceptions, but in general press is not quite free to do as they like, and it's better that way.