The product life cycle has four stages: introduction period, growth period, maturity period and decline period. Product life cycle is also called "commodity life cycle". It refers to the whole process of products from entering the market to upgrading and exiting the market.

It is the economic life of a product or commodity in the market movement, that is, the cycle in which a commodity turns from prosperity to decline due to changes in consumer demand and other factors affecting the market.

The whole movement process of extending information products from preparing to enter the market to being eliminated by the market is determined by the demand and the production cycle of technology. It is the economic life of a product or commodity in the market movement, that is, the cycle in which a commodity turns from prosperity to decline due to changes in consumer demand and other factors affecting the market.

It is mainly determined by the changes of consumers' consumption patterns, consumption levels, consumption structure and consumption psychology. Generally, it can be divided into four stages: introduction period (introduction), growth period, maturity period (saturation) and decline period (decline).

Baidu Encyclopedia-Product Life Cycle