A learning path is a collection of training materials (video courses, quizzes, hands-on labs, exams) put together to achieve specific learning goals, for example, preparing you to pass a certification exam.
In enterprise accounts, an admin or team manager can include a learning path in a Training Plan and assign it to teams and members. Individual account users and team members in enterprise accounts can assign themselves a learning path as part of a Training Plan as well.
You can learn about learning paths in the Learning Paths article.