Google’s Cookie Fight Will Shape Future of Digital Advertising

Shifts in the way data is shared threaten Facebook and other rivals in the $330 billion industry.

Photo illustration: 731; Photo: Getty Images

You may not have noticed, but the web is on the cusp of a revolution. Groups of engineers around the world are beavering away on the biggest upheaval to it in a decade. The shift has the potential to drastically reshape the power dynamics of the internet and the $330 billion digital advertising industry that supports it.

It’s all about cookies. If the web is an unfathomably complex machine driven by billions upon billions of cogs, then cookies are the lubricant that keeps the thing moving. That’s because the web is, for the most part, funded by ads. And the tiny little text files known as cookies determine which ads get shown to whom. For now. Come next year, that’s all going to change.