They use the web to create and get content
See the BBC coverage here.
American teenagers today are utilizing the interactive capabilities of the internet as they create and share their own media creations. Fully half of all teens and 57% of teens who use the internet could be considered Content Creators. They have created a blog or webpage, posted original artwork, photography, stories or videos online or remixed online content into their own new creations.
Pew Internet via Le carnet techno.