Parts of WordPress that look like they're reading straight from the database are often actually going through an HTTP API behind the scenes. Loading a post list dynamically with JavaScript, or having an external PHP script pull "just the titles and excerpts of the latest three posts" — both of t...
Source: [Dev.to](https://dev.to/susumun/wordpress-rest-api-basics-what-can-you-do-with-wp-json-3ljk)