Cookie

Think of cookies like Batman’s Bat Tracer. When you visit a website, Batman sticks a cookie on your browser to follow you around. Batman can then go back to his Bat Cave and watch where you’re going and where you’ve been. A little Big Brother-ish to be sure, but cookies also provide direct benefits to surfers, including remembering passwords and bringing you offers in which you are genuinely interested (see Behavioral Targeting above).