MongoDB and JSON

I learned about MongoDB and JSON notation reading the documentation and watching the videos on youtube from following references and implemented the MongoDB and JavaScript object notation :

https://docs.mongodb.com/manual/

https://www.youtube.com/watch?v=wI1CWzNtE-M&t=923s

https://www.youtube.com/watch?v=-0X8mr6Q8Ew

https://www.youtube.com/watch?v=pWbMrx5rVBE&t=411s

I have spent 6-7 hours learning about MongoDB