You may want to snap pictures of your hotel room when you're traveling because it's luxurious or you want to show off to your friends, but there's a better reason to do so: it may save a child's life.

The TraffickCam app -- which is free and available for iPhone, iPad and Android -- allows you to upload pictures of your hotel room, where they are then matched to a database used by law enforcement. This can help the police identify where trafficked children are.

You just enter your hotel room, and your room number. You take four pictures, and you submit them to the website," Washington University Researcher and TraffickCam developer Abby Stylianou explains.

"And then those become part of the pipeline that law enforcement can use to track down where the victims are being trafficked," she said.