If you copy text fields onto your clipboard you can create lists of cards based on those text fields (there's a maximum limit of 20 rows/cards per copy).
As an example, copy a couple of bullet points from a meeting document, hoover over a backlog/board and press cmd/ctrl+V.
Copy from meeting notes.
Paste when hovering over board/backlog and a pop-up will appear.
A list is of cards created.
You can also attach images from your clipboard to already existing cards. Copy an image onto your clipboard and paste when hovering over a card.
A file upload dialog appears in the bottom left corner.
The image is attached to the card you hovered over.