Cards
Column cards
Any number of cards are supported in the "Column cards" layout under appearance. The number of columns is automatically selected based on the number of cards being displayed.
A Call To Action
Cards act as a call-to-action to draw your visitors to a particular page. Use an image that will crop well into a rectangular frame.
Card links
A card link can be an page internal to the site or an external link taking you outside the site.
More than 5 cards
If you add more than 5 cards in "column card" layout they will default to 3 columns.
Alternatively
You could use the list navigation widget if you want to display a number of links on a page.
Or for images
If you want to use cards for display images with related text content, then the gallery widget might be worth considering instead.
Stacked cards
If you want your cards to have equal prominence or have more than 5 cards, you can use the "Stacked card" appearance.
Calls to action
They work the same as column cards. The whole card acts as a focusable link.
Options
You don't have to use images for cards. You do need a title to act as the link title.
No images
If you're not using images you could consider using the list navigation widget instead.