
No Pre-rendering :
On the Initial app load, you can see a blank screen nothing was visible because the initial, the first HTML file sent from the browser was not pre-rendered on the server.
- initial the app was not interactive and no content visible.

Hydration:
- it means when the app becomes interactive.
- browser loaded with JS code.
- when the JavaScript is loaded into the browser, your web page becomes hydrated.
With pre-rendering:
- initial, when the app will have visible content but not interactive
- after, hydration the app will be interactive.
