KEY POINTS
  • Amazon CFO Brian Olsavsky called Amazon's advertising business a "key contributor" to the company's revenue growth, during fourth quarter earnings call on Thursday.
  • He said ads are meant to improve the overall shopping experience on Amazon.
  • For brands, it helps them reach new customers and drive brand awareness, he said.

Amazon had a blowout fourth quarter earnings report on Thursday, and part of it has to with its advertising business, according to CFO Brian Olsavsky.

In a call with analysts on Thursday, Olsavsky said advertising was a "key contributor" to Amazon's North American sales growth, and pointed out how ads on the site are helpful to both customers and sellers on Amazon.