Google offers new replacement for advertising cookies after 'FLoC' falls short

FILE PHOTO: The logo for Google LLC is seen at their office in Manhattan, New York City, New York, U.S., November 17, 2021. REUTERS/Andrew Kelly

(Reuters) - Alphabet Inc's Google on Tuesday announced its second try at enabling advertisers to buy ads based on users' browsing interests without having to rely on what it has described as privacy-invasive tracking cookies.

Google wants to block tracking cookies in its Chrome web browser by the end of next year, which would prevent advertising companies from logging the websites someone is visiting. Advertisers, website owners and privacy groups have all raised alarms over the planned transition, and complaints have led antitrust authorities in the United States, United Kingdom and elsewhere to watch Google's plans closely.

Online ad buyers and sellers are weighing successors to the cookies. Options include tracking users by asking for their email addresses to access websites or adopting new technologies that Google, Mozilla and other browser makers could build into their software.

Google's initial solution, known as Federated Learning of Cohorts, or FLoC, aimed to constantly group people into big baskets designed by algorithms based on websites users visited in the last week. Advertisers could show ads to a preferred basket, but they would not know the individuals in it or what interest they shared in common.

But in tests last year, some advertisers found FLoC less effective than cookies for choosing users to target and the system carried the risk of exposing an individual's browsing history, Google product director Vinay Goel told Reuters.

Companies in the $250 billion global online display advertising industry fear the loss of cookies will make them more reliant on buying ads from Google and Facebook because of their big user databases.

The new browser system, which is called Topics, groups each user in up to 15 baskets out of about 350 human-designed choices such as "fitness" and "travel" based on three weeks of browsing. Advertisers will see up to three baskets per user as they decide whether to show that individual an ad.

Goel said browsing is tracked only on websites that enable Topics, and users can dissociate from a topic or turn off the technology altogether. Testing will begin within months, he said.

(Reporting by Paresh Dave; editing by Richard Pullin)

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