What does the term secondary use mean?

5. What does the term secondary use mean? Give an example. (Chp.2)

Secondary use is the use of personal information other than the one for which it was supplied. A pizza vendor who collects the home address for delivering a pizza, and then uses that address to distribute out marketing materials is an example of secondary use. Places which collect this type of information are required to disclose what they intend to use the information for and provide mechanisms to allow individuals to opt out of such data usage.

Baase, S. (2008). A Gift of Fire: Social, Legal, and Ethical Issues for Computing and the Internet. 3rd. ed. New Jersey: Pearson/Prentice Hall.