The document discusses key concepts related to communication, media, and information. It provides examples of how communication has been affected by advances in media and information transmission over time. Specifically, it notes that in ancient Rome information was transmitted via horseback riders, while in the 1970s-1990s overseas communication was difficult and expensive. However, now people can send messages instantly via email and messaging apps. The document also discusses how media and information literacy skills can help students conduct research, develop 21st century skills, and comprehend and analyze information to create productive outputs.