The company projects section
Once you've created projects, this section of your company's page will contain short descriptions of those projects, for viewing by yourself and other members of the project. These are the same kinds of teasers that the public will see (if they're allowed to, that is), but they will also have information about the details and status of the project: number of scenes, shots, tasks, and the like.
You can also Start a new project from this page, either by importing a Final Draft document (in .fdx format) or creating it from scratch here inside ProductionNext. If you import your project's Final Draft script, we'll be able to pick out the scenes, characters, and locations you've defined in it, and set up a project with those story components. If this option is available to you, it's definitely the way to go.
You can also add the contents of a Final Draft document to a project you've created; see the Stripboard tab for more on that. However, you cannot update the contents of a project with a new version of your Final Draft document. For now, anyway.