A local shared object, sometimes referred to as a "Flash cookie," is a small data file that can be created on your computer by the websites that you visit. Shared objects are most often used to enhance your web-browsing experience, for example, by allowing you to personalize the look and feel of a website that you frequently visit. Shared objects, by themselves, can't do anything to or with the data on your computer. More important, shared objects can never access or remember your e-mail address or other personal information?unless you willingly provide such information.
A third-party local shared object, sometimes referred to as a "third-party Flash cookie," is a shared object created by third-party content, or content that is not actually located on the site you are currently viewing. Third-party local shared objects may be important for privacy discussions because they can be used to track your preferences or your website usage across different websites that you visit.