It will be a baby step, with just one percent of Chrome browsers tossing their third-party cookies initially. That's still a significant number, given estimates of 3 billion or so Chrome users. And in any event, it's a milestone that marks a major transition for the internet economy.
The Chocolate Factory clarified its cookie-killing timeline in May and confirmed that schedule last month. The one percent will be selected in early 2024, and from the third quarter of that year, the phase-out will likely start expanding.
They're used mainly for staying logged into sites; personalizing the appearance of a page; and tracking your activities. When used in a first-party context (the cookie is written and read by the website being visited), they're not particularly controversial. But when used in a third-party context (set by a third-party tracking script included on the first-party website), they pose a privacy problem in that they allow organizations to conduct cross-site tracking.
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