This block is a replacement for the stories plugin that was used in the Ponderosa template. The Units News and Update block is made up of three components, the Unit Update Section folder that holds your posts and archive page, the Unit Update Posts themselves, and the News JSON block you attach to your page. Once created the block will automatically update with any new posts created with the Unit Update Section folder. The 'More Updates' or archive page is limited to 25 posts, so for applications that require more than this the Cards/Card Deck block may be more suitable.
Cascade Support Tutorial
For a detailed tutorial and examples of this block, please refer to the Cascade Support Tutorial on the Unit News and Update block.