Why use WordPress REST API?

The introduction of the REST API opens up a lot of new possibilities as to what you can do with a WordPress site and what you can use it for. For instance, via the REST API, you can interact with WordPress content remotely, add new content, erase content, or perform any other operation. Just to name one major possibility, this makes it easy to create a mobile app for your website, and have the app communicate with the website via the REST API. In other words, if you want to communicate with a WordPress site via any other way than by visiting the site directly, then you can do that with the REST API.