"Ok, if I understand this correctly, our administrators will have to create keywords to link documents with phases and projects."

You use keywords to match knowledge documents (documents in knowledge projects) to phases containing tasks, but not to individual tasks. Matching knowledge documents to a phase using keywords is a subscribe–publish relationship.
- Knowledge documents publish keywords
- Phases in projects subscribe to keywords
You can only subscribe to keywords in phases in a project template. You cannot create ad hoc subscriptions to keywords in individual project phases.
The video demonstrates how users can publish keywords and match them to knowledge project documents and to sourcing full project phases. Select the play button to watch.