Cards can have different configuration fields, depending on the type of board you’ve selected. For example, in a Roadmap board you’ll find the cards include an option for Type where you can add categories such as Bug, Triage, etc. A Task board doesn’t include a Type field, but includes Status and Priority. All cards have a New Property field. For this field, you can select the type from the drop-down menu. It’ll then be added to your card.
The default name for a new property is New Property. Ensure that you name your property as it’s added to the filter list at the top of the board and having all your filters named New Property makes it difficult to work out what you’re filtering. You can rename a property field by opening up a card and selecting New Property. Enter the new name in the field provided. The change is saved immediately and applied across all cards.