Blocks are the components for adding content in the new WordPress block editor. There are many different block types available for you to use. We will be adding to this documentation soon, but for now, here is a list of the blocks that are available.
The WordPress Editor is a brand-new publishing experience. You can use it to create media-rich pages and posts and to control their layout with ease. Instead of worrying about the alignment and organization of text, quotes, and images, now every element on a post or page has its own block — and you can focus on creating.
WordPress provides information about the Editor and its default blocks:
This theme supports the Block Editor and provides its own styles for default blocks to match an initial design of the theme. Moreover, the theme provides support for other blocks that come from recommended plugins. We are constantly working to improve these styles to provide you with a professional theme.