Jotai takes a bottom-up approach to global React state management with an atomic model inspired by Recoil. One can build state by combining atoms and renders are optimized based on atom dependency. This solves the extra re-render issue of React context and eliminates the need for memoization.

Atoms contain the source of truth for our application state. In our todo-list, the source of truth will be an array of objects, with each object representing a todo item.