Season 4 of Diablo III included something brand new. The Season Journey has several Chapters. Players who work their way through all of it will get a special Portrait Frame and Pet. So far, I’m having a great time with it and looking forward to completing the entire thing.
Players start with Chapter I of the Season Journey. You will be able to see all the tasks that are part of that chapter. I learned that it is possible to complete tasks from Chapter II before you finish Chapter I. However, you can’t unlock a new Chapter until you finish the previous one.