The intended audience for an ad, usually defined in terms of specific demographics (age, gender) and psychographics (interests, behaviors).
Independent outsourced companies that specialize in managing, maintaining, serving, tracking, and analyzing the results of online ad campaigns.
A small text file stored on a user's computer by a party that is not related to the website/brand/publisher or the user that is used...
Information that an established data company collects indirectly or aggregates from others and then sells to ad buyers.