The goal of this new editor is to make adding rich content to WordPress simple and enjoyable. This whole post is composed of pieces of content—somewhat similar to LEGO bricks—that you can move around and interact with. Move your cursor around and you’ll notice the different blocks light up with outlines and arrows. Press the arrows to reposition blocks quickly, without fearing about losing things in the process of copying and pasting.

Try Building Posts 
With New Block Editor

What you are reading now is a text block the most basic block of all. The text block has its own controls to be moved freely around the post…

… like this one, which is right aligned.

Headings are separate blocks as well, which helps with the outline and organization of your content.

A Picture is Worth a Thousand Words

Handling images and media with the utmost care is a primary focus of the new editor. Hopefully, you’ll find aspects of adding captions or going full-width with your pictures much easier and robust than before.

Try selecting and removing or editing the caption, now you don’t have to be careful about selecting the image or other text by mistake and ruining the presentation.

You can change the amount of columns in your galleries by dragging a slider in the block inspector in the sidebar.

Media Rich

If you combine the new wide and full-wide alignments with galleries, you can create a very media rich layout, very quickly:

Sure, the full-wide image can be pretty big. But sometimes the image is worth it, Any block can opt into these alignments. The embed block has them also, and is responsive out of the box:

The above is a gallery with just two images. It’s an easier way to create visually appealing layouts, without having to deal with floats. You can also easily convert the gallery back to individual images again, by using the block switcher.