Google is betting big on virtual reality.

The emerging technology is on center stage at the company’s bustling beachfront pavilion at the Cannes Lions advertising festival this week.

And Google is making it clear that it believes that no platform has more virtual reality content than YouTube.

But how many people even know what virtual reality is—let alone that it is available on YouTube or that Google makes a product called Google Cardboard that lets people watch VR videos using their mobile phones?

“The people who have used or even know about VR at this point is a rounding error,” said Clay Bavor, Google’s vice president of virtual reality. “It’s approximately zero percent of the world.”