Then what is the definition of a monopoly? It doesn’t appear to be the same definition as “the exclusive possession or control of the supply of or trade in a commodity or service.” Do they exclusively control all ad inventory? Do they control all devices receiving ads? GP states that they don’t have exclusive control broadly, just within their own ecosystem. That’s not the definition of a monopoly though, so it seems like a motte and bailey calling google a monopoly.
It's just a term that gets simplified by journalist and articles, because no one is familiar with monopoly power.
From the court filing:
> Plaintiffs have proven that Google has willfully engaged in a series of anticompetitive
acts to acquire and maintain monopoly power in the publisher ad server and ad exchange markets
for open-web display advertising.
