Cards are the post-it notes of your boards and backlogs. But it can hold a lot more information then a traditional post-it note. This article gives you an overview of the functionality on your cards and will link to more in-depth articles if you want to explore further.
Title - This is the name of your card.
Description - Describe what your card is all about.
Comments - Comment and converse on your card.
Activity feed - Shows all the activity on your card
Members - Add members to your card.
Start/Due - Set start and due dates on your card.
Tags - Tag your card.
Tasklist - Create tasklists within your card.
Files - Attach files to your card.
Subscribe - Subscribe to your card
Archive - Archive your card.
Delete - Delete your card.
Relations - Your cards relationships.
Break down to Board - Turn your card into a board.
Break down to Backlog - Turn your card into a backlog.