Custom fields let you add your own fields to categories, products, customer records, etc. For example, you can add a custom product field, such as MSRP, and display that field on a product page. See page 527 for several examples.
Type: Select the type of custom field that you want to create.
Code: The code uniquely identifies your custom field in the database.
Name: The field name is displayed in the admin interface.
Field Type: Use the field type to select a control or interface for the custom field. Most of these types are familiar and self-explanatory. You can create custom fields with text areas, radio buttons, checkboxes, etc. The one exception is a field type of "Image Upload", which is a bit different from the others. See Example: Adding a Custom Field with Image Upload.
Group: Custom field groups let you organize your custom fields. See Utilities > Custom Field Groups. The Group drop down list will show all of the custom field groups that you have created.
Additional Information: Add "hover text" to custom fields that appear in the admin interface. You might use Additional Information to tell admin users what kind of information they should put in the custom field or how the custom field is used.