1All npm packages contain a file, usually in the project root, called package. json - this file holds various metadata relevant to the project. This file is used to give information to npm that allows it to identify the project as well as handle the project's dependencies.
1metadata specific to the project
2a web application, Node.js module, or even just a plain JavaScirpt library.
3identifies the project and acts as a baseline for users and contributors
4to get information about the project.
5contains a collection of any given project's dependencies
6