The Bass Diffusion Model is a marketing model that predicts how new products are adopted by customers. It was developed by Dr. Frank Bass in 1969 and has since been used to explain the diffusion of innovation in a variety of industries. The model can be used to estimate the future sales of a new product, as well as the rate of adoption for different customer groups. Additionally, the model can be used to understand how marketing campaigns can influence the adoption of new products.