There exist different variations how a portfolio can be used. This process describes the one of an assessment portfolio. In this process authors as well as users are involved in interaction with each other.
More information about the particular processes you can find in the corresponding process step.
Authoring
Authoring
Authoring
You do not necessarily have to add a portfolio template to a course. It can actually also be provided as an independent learning resource.
Hint: It is best practice to discuss the assessment criteria with the users beforehand.