package.json is always the entry point of a project vahan proj ka name version dependencies pta lgti h react and react dom are main lib here

it has scripts also scrpit hi por ko chlati h ya prod k liye ready krti h

web vital track the performance and speed

npm i if module are not there in folder so to inatall them

VIDEO3********* //main page jo load hoga is index.html in pulib main file of src is index or main.js