What happens when a new project is created using Ember-CLI?

I am new to Ember and was wondering how Ember-CLI works.

When I type ember new or use init, what happens behind the screen?

installing app
create .bowerrc
create .editorconfig
create .ember-cli
create .jshintrc
create .travis.yml
create .watchmanconfig
create README.md
create app/app.js
.
.
.
create bower.json
create config/environment.js
create ember-cli-build.js
create package.json
Successfully initialized git.
Installed packages for tooling via npm.
Installed browser packages via Bower.

What do all these lines signify? Other than the ones creating directories. Specifically, how are bower.json and package.json filled initially?