The document discusses the five levels of communication:
1. Intrapersonal communication refers to communication within oneself, such as internal thinking.
2. Interpersonal communication involves exchanges between two people through one-on-one interactions.
3. Small group communication refers to interactions between 3-12 people, which enhances creativity but can also lead to factions.
4. Public communication is speaking to an audience of 12 or more people, requiring the speaker to keep the audience's attention.
5. Mass communication allows for messages to reach many people across different places and times through mediums like television, radio, newspapers and the internet.