Diffusion of Innovations is a theory that seeks to explain how, why, and at what rate new ideas and technology spread through cultures. It identifies the stages of adoption over time and the roles of different participants in the diffusion process, from innovators to laggards.
Communication channels are the mediums through which information is transmitted from a sender to a receiver, influencing the effectiveness and clarity of the message. They can be formal or informal, verbal or non-verbal, and are chosen based on factors such as audience, context, and the nature of the message.