Let me help you.
Do you know someone that is has trouble communicating? Does this person get frustrated when he or she is not understood? Is this person having trouble accessing his or her environment? Does she have trouble doing the things he/she needs to do on a daily basis? Are you a mother, father, sibling, or friend of someone that may benefit from methods to enhance their ability to communicate? Are you a speech-language pathologist looking for more info to help your clients/students?
Take a deep breath, because you're in the right place.