FlutterFlow Libraries address common challenges in app development, such as duplicate flows and inconsistent UI, by allowing developers to package entire projects, including components, API calls, and custom code, into reusable Libraries that can be imported into other apps. This approach promotes consistency, modularity, and easier maintenance as projects scale. To publish a Library, developers must prepare their projects, ensure there are no errors, and follow specific steps to convert the project into a Library. Once published, Libraries can be imported into other projects, giving access to components, API calls, custom functions, and more. Managing Library versions and handling dependency conflicts are crucial for maintaining project stability, with options to upgrade, rollback, or control updates as needed. Libraries also support configurable variables, allowing for flexibility and reuse across different contexts. This framework, exemplified by use cases like creating Payment, Auth, and UI Components Libraries for an e-commerce app, reduces duplicate work and speeds up scaling by centralizing feature updates, ultimately transforming FlutterFlow projects into scalable and maintainable building blocks.