Which field should hold "ghost text" that provides an idea of what to enter when creating a marketing page field?

The field that should hold "ghost text" or instructional text that indicates what a user should enter is called the Placeholder. Placeholder text appears in a field before any user input, serving as a guide or example of the type of information that is expected. This feature is particularly important for enhancing user experience, as it helps to clarify what content is required and can reduce input errors.

In contrast, labels serve a different function by identifying what the field is for but do not provide specific guidance on the type of input. The prefill option is designed to automatically populate a field based on prior user input or data, and the default value refers to a predetermined entry that appears in the field, which may not provide any guidance or example of acceptable input. Thus, using a placeholder effectively conveys necessary instructions to users during the data entry process.