A Learning Path is a curated sequence of lessons built around either a skill (say, typography fundamentals) or a career goal (say, becoming a product designer) — the difference being how narrow or broad the path is, not how it's delivered.
Each path is broken into modules, and each module into individual lessons. Paths are also leveled — beginner, intermediate, or advanced — so you can find something that matches where you're actually starting from rather than working through material you've already outgrown, or that's over your head.