In React there are several built-in Hooks like `useState`, `useEffect`, and `useContext`. Sometime you need to create your own Hooks for specific purpose like checking user session, fetching data, or showing notifications...

Traditionally, you pass information from a parent component to child component via props in React. But data passing through this props drilling can make your code verbose and inconvenient if you have more components in the middle, or if many components in your app need the same information.