The document discusses different types of demand in marketing including negative demand for products that are disliked, nonexistent demand when consumers are unaware of a product, latent demand for needs that no existing product satisfies, declining demand when purchases decrease over time, irregular demand that varies seasonally, full demand when all products are purchased, overfull demand when more want a product than can be supplied, and unwholesome demand for products with undesirable social consequences like cigarettes. Examples are provided for each type.