There are four (4) stages in the product lifecycle. They are introduction, growth, maturity, and decline. Some sources may state additional stages (e.g., development), but any additional stages would fall within the existing four major stages.
The product lifecycle is important because it helps offer guidance for developing optimal strategies to use during each stage to promote the success of a product in the marketplace.
Source: interaction-design.org
Determining the best way to market or sell your products varies as the new products are introduced to the market. For example, as you introduce a new product to market, you may adjust your strategy based on whether or not you are first to market or trying to beat an existing company’s product.
The ultimate guide to product lifecycle management (PLM) software.