Gutenberg editor is the all new way that you can write content in WordPress. It replaces the old WYSIWYG editor and completely changes the experience of creating content with WordPress.
Gutenberg brings new innovation too and is meant to future proof WordPress and make it more competitive with alternatives such as Medium, Wix, Weebly and Squarespace.
It gives you as a content creator more flexibility and control in an interface that looks like the front end and is more intuitive.
In words of WordPress “get ready to make your words, pictures, and layout look as good on screen as they do in your imagination, without any code”.
Gutenberg editor is named after Johannes Gutenberg, who introduced mechanical movable type printing to Europe and started the printing revolution in the 15th century.