Cookies and cache

Temporary Internet files, or cache, contain a "travel record" of the items you have seen, heard, or downloaded from the web, including images, sounds, web pages, even cookies. Cookies are cryptic bookmarks that a website can place on your computer to acknowledge your prior visit, authenticate your access or let you continue surfing a site from where you last left off. They can leave a trail of evidence of where you have been on the web. So if you visit a website on domestic violence and a cookie is created, others can trace your trail and discover where you've been.