package.json - overall project configuration file. Lets you configure dependencies and their versions, project scripts, etc.
.gitignore - lets you specify which files or directories you want to ignore from git
public/index.html - initial html document for the website
src/App.js - contains the main react code for the application
src/index.js - inital java script file that is launched when the application is run
src/styles.css - contains css styling
package-lock.json - version locking for dependencies of dependencies
node_modules - large directory generated by npm install contains all installed dependencies