Simply put, it's the digital format of telling our stories. Stories have been around since the beginning of time, and we tell stories from the time we are children. Many times children are the best storytellers! Ask a child to tell you a story and they have no problem creating one without much thought. Ask an adult to tell you a story, and it make take a long time.
Digital Storytelling can use many media. It could be video, audio, animation, multimedia, pictures, and so on... Digital Storytelling programs can be found for Mac and PC, and many are online and can be used by any platform. Some are free, and some are commercial.