Puzzle Goal Progress is a great way to see how much work a student has done. Students earn Puzzle Goal Progress for all work assigned to them, so even students with intervention content assigned, or early finishers working on challenge content will earn puzzles. This metric is also visible to students. This makes it perfect for creating goals for your class, student accountability, and holding challenges or contests that all students can contribute to.
Journey Progress shows how much of the student's current curriculum they have completed. It's great for showing that a student has mastered all of their assigned grade level standards and is ready to work on more advanced material.