Here's One Area of Amazon's Growth Story That May Surprise You

Amazon (AMZN) - Get Report reports quarterly earnings after the close on Thursday.

The company is fast emerging as an advertising giant. While Amazon doesn't break out its advertising revenue, it is contained in its "other" revenue category, which was a staggering $2 billion for its previous quarter, growth of 139% year-over-year.

Amazon is a holding of Jim Cramer's charitable trust, Action Alerts PLUS.