(1) Basic functions.

Basic function is the core function of the product, which refers to the basic utility or benefit function that the product can provide to customers, including product characteristics, life, reliability, safety and economy. It is the part to meet people's basic needs for products and the central content of customer needs.

(2) Psychological function.

Psychological function is the intermediary function of products, refers to the function of products to meet the psychological needs of consumers, and is the external characteristics and popularity of products.

Modeling is largely determined by people's perceptual requirements, such as brand awareness, novel and unique style, exquisite and simple packaging and so on. These are the different forms to meet customers' needs, the parts to meet people's expanding needs, and the carriers of the basic functions of products.

(3) Additional functions.

Additional functions are the joint functions of products, which refer to the functions that products can provide consumers with various additional services and benefits, such as product use demonstration or guidance, free delivery, quality assurance, equipment installation and maintenance, technical training, pre-sale and after-sales service, credit provision and services that provide customers with professional knowledge such as product structure, performance, quality, technology and daily use precautions.

Among the three functional levels of products, the basic function is the foundation and framework of products, and whether the products are advanced in technology, high in quality and reasonable in price is the main factor that determines the competitiveness of enterprises' products. Psychological function is the enrichment and enrichment of basic function. With the development of economy and the improvement of people's living standards, the concept of consumption has turned to meet psychological and emotional needs. For example, today's clothing is far from just to keep out the cold, but to meet people's psychological needs of pursuing elegance, exquisite workmanship, unique style, fashionable style and so on, which can reflect individual personality and pursue famous brands. Doing a good job in the design of additional functions of products plays an important role in establishing a good image and improving the reputation of enterprises, winning the trust of more users and increasing the competitiveness of products.