Info.md

1. in use state updated value is going to be shown in new render not the current render.

2. useRef will allow us to read the value of updated without the re-render.

3. use Memo is to memoise a value and the memo is higher order component used to memoise the rendering of a functional component.It prevents a functional component from re-rendering if ist props havent changed.

4. Session management in Node. js involves the crucial task of maintaining users' states or data throughout their interactions with a web application. Despite HTTP being a stateless protocol where the server treats each request independently, session management techniques ensure continuity by tracking user sessions