The product life cycle has four main stages: introduction, growth, maturity, and decline. [1] In the introduction stage, sales are low due to lack of customer awareness and high production costs. [2] The growth stage sees rapidly increasing sales from positive word of mouth and promotion, while costs decrease due to economies of scale. [3] Maturity brings slower sales growth as the market saturates and competition intensifies, driving up costs. Most customers have adopted the product by this point.