The document discusses the product life cycle and its stages - introduction, growth, maturity, and decline. It provides examples of products in each stage: virtual reality in introduction, LED TVs in growth, LCD TVs in maturity, and CRT TVs in decline. The stages are defined as introduction having low sales and profits as the product is new, growth seeing faster sales and peak profits, maturity where sales peak and competition increases, and decline when the product reaches saturation and sales/profits decline.