1, information cannot exist independently, it must be attached to some kind of carrier.
2. The forms of information are: voice, language, text, graphics and images, video, symbols, etc.
3. Information often only reflects the state of things at a certain moment and will change with the passage of time.
4. For different information recipients, the value of information is different, which is closely related to the needs and quality of information recipients.
5. The significance of information exchange: openness, independence and concealment, which need to comply with the national convention on youth network civilization.