By default your Tasks come with the following fields: Priority, Status, Assigned, Start Date, Due Date, Finished, and Tags. All of these fields will be visible to visitors to your To Do List. However, there is an option to hide fields from visitors who don't have edit rights to your To Do Lists. This allows you to keep some task information private if you choose to do so.
To learn how to hide task fields from visitors without edit rights follow the steps in the image below:
You can also hide any custom fields that you add to your Tasks.