When people talk about worldbuilding, they sometimes use setting and world as though they mean the same thing. They are related, but they aren't interchangeable. A setting is where a story takes place. A world is the larger system that makes that setting what it is.

There is no magic number of pages. There is no required number of countries, historical events, religions, cultures, or magical systems. There is no minimum amount of worldbuilding you must complete before your world is “properly developed,” and there is no rule saying you've gone too far because you've created more worldbuilding than will ever appear in your story.

There is nothing wrong with building a deeply complex world. In fact, readers often love deeply complex worlds. The goal isn't to avoid complexity. The goal is to build complexity in a way that readers can understand, remember, connect, and become fascinated by. Your world can be as complicated as an encyclopedia. Your readers just shouldn't have to learn the entire encyclopedia at once.

Worldbuilding is an exercise in systems thinking. Every decision you make influences dozens of others, whether you intend it to or not.

Originality Isn't About Inventing Something That Has Never Been Done. One of the biggest misconceptions in worldbuilding is the belief that originality comes from creating ideas that no one has ever imagined before. In reality, originality comes from how ideas are connected, why they exist, and what consequences they create.