Hooks allow function components to have access to state and other React features, such as lifecycle methods. These Hook features were introduced to React version 16.8. One of the interesting things about the Hook features is that they let you use React without classes. This, in turn, helps simplify your

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React Hooks allow function components to have access to state and other React features, simplifying codebase and improving performance. Different types of React Hooks include useState, useEffect, useRef, useReducer, etc. The useState Hook enables state variables in functional components.

React Hooks – How to Use the useState & useEffect Hooks in Your Project

Keep in mind that a new hook that gives an alternative to useEffects for promises &amp; context, in version 19 which will be arriving soon : 
<a href="https://react.dev/reference/react/use" target="_blank" rel="noopener nofollow">https://react.dev/reference/react/use</a>
Nice post btw ! ♥

Nice post!
Btw in the snippet of the correct usage of a hook there is an incorrect closing bracket.

The closing curly brackets in the <code> correct way of implementing the Hook feature:</code> snippet is placed in wrong position ,and might confuse beginners .

Great overview.
FYI React has Function components, not functional components.