Doubleclick was launched in early 1995, in Atlanta, but moved to New York shortly thereafter. It was bought by Google a decade later.
Doubleclick sold ads based on intrinsic targeting. The system used cookies to learn things about you, then buyers took out ads aimed directly at what you were doing. This led to things like a mother being offered cookie recipes at a gun site, or a gun owner being shown a magnum when he’s looking into champagne vacations.
These kinds of ads are intrusive. They invite blocking. They’re irrelevant to where your head is right now and their performance is thus very, very poor. But this doesn’t matter to an advertiser who can buy 100 such ads for what a specific web site on, say, guns might ask for a single impression. They get it back on volume.