Functional map vs. decorative map
A functional map helps readers track character movement, understand geographic relationships, and orient themselves spatially in a world they cannot visit. A decorative map signals genre, adds visual interest to the book's front matter, and serves as a shareable marketing asset. Most good fantasy maps serve both functions, but the functional purpose should drive design decisions. If placing a mountain range in the northwest makes the map look prettier but contradicts the journey described in Chapter Seven, move the mountain range. Geography serves the story; it does not override it.