According to Moodle Docs, Moodle portfolios enable data, such as forum posts or assignment submissions, to be exported to external systems.
Moodle portfolios have to be enabled by selecting the Enable portfolios parameter in Advanced features. Once this has been done, you have access to all available portfolio plugins in Plugins | Portfolios | Manage portfolios.
Each portfolio has one of thre states:
Once at least one portfolio has been ...