Settings are the places in your story: the cottage, the meadow, the treehouse, the busy little harbour. Just like characters, you build a setting once and reuse it everywhere, so the same meadow looks like the same meadow on every page.
How settings work
A setting lives in your World, alongside your cast. You give it a name and a description, and you give it reference pictures, either by uploading your own or by generating some and keeping the ones you like. The references are what keep the place looking the same each time your story returns to it.
Why they are worth building
Children's books circle back to the same places again and again, and readers notice when a familiar room suddenly changes shape or colour. By saving a setting with its own references, you let the World bring the right place into a page automatically, without you re-describing it. You write "back home in the kitchen," and the kitchen you built appears.
Reuse across books
Because settings live in the World, every book you make can lean on them. The meadow you set up for your first book is right there, ready, for your fifth. That is the whole idea of a World: build the pieces once, tell many stories with them.
Settings follow the same reference rules as characters, covered in reference pictures, explained.