input: [1] Advertisers on the website [2] url date/time IP city/state/country (from IP) search keywords (maybe) referrer (maybe) other information about your interests/identity (maybe) [3] Advertisers want to know where you live, what you’re interested in, and anything else they can. They can track you between sites, so they know you are the same person who was interested in zebra mating rituals last week. [4] Indefinite. Whatever they want it to be. [0] 
output: You are shown advertisements on PandaLovingInfo.com offering many wonderfully peculiar items.