Layout Elements can be used to form the basis of a page or post.
Card decks allow for a unique visual display of information about a site. The main benefit of card blocks is the flexibility in customization. The user can add images, buttons, links, writing, and other components to the various blocks.
You can view more specific examples on the Card Decks page.
In addition to Card Blocks, there are also formatting blocks like the spacer, page break, and separator. These blocks are not meant for displaying content but for aesthetic and customization purposes.
Finally, there are miscellaneous blocks like the stats block, which allows the user to display statistics that draw the viewers eye to the number.