Timelines establish the sequence or schedule for your story. Everything on them should be necessary to the world or your characters and must be done in a precise order so that what you create makes sense in story form.
Story setting is more than just the physical stuff. It’s the mood and culture, period and genre, and many other things all wrapped into one. But it’s worth parsing out to find the sticky spots in your work that need more detail.
Your characters are worldbuilding tools, but they are also much more. Use them correctly, interact with them as if they were real, and you’ll see them come to life. They’ll become the guides to your storyline and world.
Your map represents the world your characters live in. It might be as small as a doll’s house or as large as a multi-galaxy supercluster, and that’s fine…provided you can keep it all straight.