There are also cookies that remember more detailed information about you. Perhaps your interests, your web browsing patterns, etc. This means that a site can provide you more targeted content – often in the form of ads. There are types of cookies, called <em>third-party</em> cookies, that come from sites you’re not even visiting at the time and can track you from site to site to gather information about you, which is sometimes sold to other companies. Sometimes you can block these kinds of cookies, though not all browsers allow you to.

Der findes også cookies, der kan huske mere detaljerede oplysninger om dig. Det kan være dine interesser, dine browsing-vaner mv. På den måde kan websteder vise dig mere målrettet indhold, ofte i form af reklamer. Der findes desuden en slags cookies, der kaldes <em>tredjeparts-cookies</em>, som stammer fra websteder, du ikke engang behøver at have besøgt. Disse tredjeparts-cookies kan følge dig fra websted til websted for at indsamle oplysninger om dig - oplysninger der nogle gange bliver solgt videre til andre virksomheder. Nogle gange kan du blokere denne type cookies, men ikke alle browsere tillader det.