I love the idea of a quest. It's an adventure over a set period of time with a clear outcome. Most quests have a narrative, and like Gideon Lewis Kraus says (paraphrasing) "They are loose enough in narrative to allow for a lot."
A quest is mutable, it's an activity that can span time and directions but centers on the process of transformation. A quest can be a pilgrimage, pursuing a degree, building a business. But, fundamentally, what a quest entails is effort over time to get to some point (physically or otherwise).
There is something so appealing about a quest for me that probably stems back to reading fantasy books as a kid. Human experience is never truly linear in the way a storybook quest can appear but what if it was?