Good news for internet marketers: Teens with disposable income are increasingly turning to the web to learn about products and make purchases. Piper Jaffray's Taking Stock with Teens Spring 2011 report reveals that teens are willing to spend more for quality products and services, and the internet is key in influencing their shopping decisions.

As eMarketer relays, Piper Jaffray found the internet is a top source impacting teens' clothing and footwear choices. It is second only to friends' opinions when it comes to these purchases, which may suggest that internet marketers should increase their social marketing efforts to boost word-of-web recommendations.

The internet is the No. 3 channel influencing overall purchases for both boys and girls.

Teens are slowly moving toward online shopping as well. The survey found that nearly one in 10 teen girls (7 percent) says online shopping is her favorite channel, and 15 percent of male teens favor online shopping.

Marketers should leverage teens' growing interest in online shopping and buying to tap into a $200 billion market. As Brafton has reported, a Packaged Facts study reveals that 12- to 17-year-olds will spend an estimated $208.7 billion this year.