Publish a project
After you have created a project in Project Web App, or after you have made changes to a project, you need to publish the project. Publishing the project makes the most current information available to others, including the team members assigned to the project’s tasks.
To publish your project:
Note Only enterprise projects, which are managed in Project Web App, can be published. SharePoint task list projects are automatically available to those who have access to the project site.
On the Schedule page for the project, click the Task tab, and then, in the Project group, click Publish. The project is saved and then published.
Once you have finished publishing the project, if you have no other changes, you can click Close in the Project group on the Project tab or the Task tab. This will prompt you to either check the project in, or keep it checked out.