Explanation
Knowledge blocks are reusable pieces of content secured by user criteria that you can add to knowledge articles in a knowledge base. The user criteria controls which users can read or not read the block content in an article or search, enabling users to more easily view content that is relevant to them.
To insert a knowledge block, place your cursor in the location in the field where you wish to insert it. On the right-hand side of your window, click the Add Blocks button. Find the knowledge block that you want to use and click Insert. (You may also see what the knowledge block contains by clicking anywhere on it.)
Familiarize yourself with the knowledge blocks available so that you do not re-create content already available as a block.
Knowledge blocks can be checked out, modified, submitted for review, etc., just like regular articles.