Hotels or mobile phones contain five levels.

Core interest layer, tangible product layer, expected product layer, extended product layer and potential product layer.

1. Core benefit level: refers to the basic utility or benefit that a product can provide to consumers, and it is the basic utility or benefit that consumers really want to buy. For example, the core interests of mobile phones are that consumers use mobile phones to communicate, cultivate feelings, expand social circles and facilitate contact, which is the basic demand of most people for mobile phones.

2. Tangible product level: it is the specific material form of products when they appear in the market, mainly in terms of quality, characteristics, styles, trademarks, packaging and so on. And it is the material carrier of core interests. For example, the appearance of the mobile phone, the packaging of the mobile phone, and the related accessories of the mobile phone such as chargers, earplugs, batteries, manuals, warranty cards and other specific material forms.

3. Expected product level: refers to the customer's expectation of the quality, usability and characteristics of the purchased product before purchasing it. For example, when buying a mobile phone, consider the quality problem, whether it is convenient to use and carry, and what special functions it has, such as taking photos and surfing the Internet.

4. Extended product level: refers to the product level provided by the producers or operators of the products that buyers need, mainly to help users make better use of core interests and services. For example, mobile phone warranty period, free maintenance telephone, nationwide warranty, free consultation, door-to-door delivery and so on.

5. Potential product layer: it is a product layer provided by enterprises to meet the potential needs of customers in addition to extending the product layer, mainly a value-added service of products. For example, mobile e-commerce of mobile phones, online financial transactions, wireless network connection and the enjoyment of network resources.