Congratulations! You have just made Drupal generate data into JSON format that allows third-party systems to retrieve this data, and in our case, display the data in our frontend made in React.
Now, you can amend this to allow additional fields and amend how the styling of the page is, but this would require a more in-depth look at React.
As data is added to our feed, our output in our frontend will change and there will be nothing that is required to update our rendered content.
There are many alternatives to using React and this can either be achieved using jQuery library or there is a fantastic Drupal distribution called Contenta CMS (http://www.contentacms.org). I really recommend this as a great simple solution to.