How the Block editor works
The Block editor offers individual content blocks for users to add and edit various elements in posts and pages. Each block is a standalone component with settings for users to configure.
Creating content using the block editor is straightforward. On the Pages dashboard, go to Pages or Posts → Add New to open the interface.
Clicking the block inserter + icon on the left will show all the blocks organized by their function. Simply drag and drop a block to the editor and place it where suitable.
With the Pages block system, you can customize the entire block using the toolbar that appears on top of the element or in the settings bar on the left-side panel.