React was released with an update to React's core (Reconciler) algorithm. This new algorithm is called Fiber. Before diving deep into what is Fiber and how it works, it is must to know the React's reconciler algorithm as Fiber is nothing but the re-implementation of this previous algorithm. You can refer to the reconciler algorithm on React Official doc here. React ReconciliationIt's an algorithm that React uses to diff one tree with another to find which parts need to be updated in the next update. E.g. whenever the component's props or state gets updated, whether to make an actual