Intro to Hooks
Hooks were introduced in React Version 16.8.
Before hooks, all state needed to be within a Class component. Class components come with a lot of boilerplate, which can feel bulky, especially when dealing with a simpler state. Function components, on the other hand, are generally simpler and easier to read - but, until recently, could not manage their own state: they would receive some props, and return some JSX based on those props.
Hooks introduce state management to Function components, using a simpler and more flexible API. Here's an example of a Class component refactored to be a Function component with hooks: