"Activity on Twitter’s ad manager, a subdomain of Twitter’s ad platform sites that specifically hosts those creating or monitoring ad campaigns, declined nearly

"Activity on Twitter’s ad manager, a subdomain of Twitter’s ad platform sites that specifically hosts those creating or monitoring ad campaigns, declined nearly 74% in October from a year earlier, according to the firm’s data. In November, visits fell 85% on the same basis—the largest ad traffic decline since Twitter’s change of hands." Similarweb must have tracking that allows them to monitor visits to third-party websites. I'm not sure how, maybe someone can shed some light?