Main properties / parameters that the file includes:

name

- name of the app (default is the name of the current folder)

version

- version of the app (default is 1.0.0 - major.manor.patch)

description

- short description for the project

main

- entry point - main JS file

keywords

- keywords that the app is related to

author

- project author

license

- default is ISC (Internet Systems Consortium)