This is a system used to memorize the order of a deck of cards. By associating each card with a person, an action and an object, the total number of images needed to be remembered is smaller. You create an image to remember by taking the person from the first card, the action from the second and the object from the third. This image is then stored in a memory palace.
Some of the images may not be familiar to you. Maybe try googling them or make your own personal deck.