Predefined (Shared) Content
Adding components to your page
Shared Content in Sitecore is now referred to as Predefined Content in Cascade.
Once you have created a block of content for sharing, add it by selecting Predefined Content from the Component Type menu:
Then select the content block by clicking Choose Block.
The explore side window will open and you can navigate to the content you wish to use. Once selected, chick Choose at the top right.