The most useful is the ability to manage all the projects in one place. The ability to manage the various stakeholders in a project and the ability to have a central repository of all the project information. The ability to have a centralized place for all the project information and the ability to have it easily accessible by all the stakeholders. The ability to have the project information in one place and not have to search for it in multiple places. The ability to have the project information easily accessible by all the stakeholders.