Why do we use useMemo?

React useMemo: How to Cache the Value of Expensive Utilities?

The primary purpose of `useMemo` is to optimize performance by avoiding redundant computations. When a component re-renders, any expressions within it, including function calls, are re-evaluated. If a function call involves expensive computations that don’t need to be recalculated on every render, using `useMemo` can significantly improve performance by memoizing the result and only recomputing it when dependencies change.

How to use useMemo Hook in a Functional Component in React ?

In React development, optimizing performance is crucial for delivering responsive and fast user experiences. One way to achieve this is by using the `useMemo` hook.

In this article, we’ll explore what `useMemo` is, why it’s beneficial, and how to use it effectively in functional components.