The #Product_Life_Cycle is one of the most important ideas in Marketing, Strategic Management, and #Product_Management. It explains how a product usually moves through four main stages: Introduction, Growth, Maturity, and Decline. Although real markets are often more complex than any single model can fully describe, the Product Life Cycle remains useful because it helps managers think clearly about Pricing, Promotion, Investment, Innovation, #Customer_Behaviour, and #Competit