How to use Reusable Block in WordPress Block Editor (Gutenberg)

One of the most exciting features of WordPress Editor codenamed Gutenberg, is the ability to use a reusable block. The WordPress Editor is where you create pages and posts on your website.

Gutenberg is a codename for a whole new paradigm in WordPress site building and publishing, that aims to revolutionize the entire publishing experience as much as Gutenberg did the printed word.