It is not difficult to simply do the functions of marketing, CRM and other systems. As long as someone says what function I want, we can do it according to the demands he said, and in fact, we can create functions that "satisfy" most of the needs, so I Fax List say it is not difficult. That's why it's easy to get started with a product manager, as long as you're willing to take the time to listen, you can do it. As for why some people say that it is difficult to make products, because it is difficult to achieve a global optimal solution in order to do a good job in requirements and products, and it is very difficult to "eat" the accumulation of product managers themselves. For example, if you want to do a good job in marketing related products, you need to have some knowledge of products, services, promotions, information, currency (value) and other aspects, and have a certain grasp. 1. Marketing Doing such Fax List systems as CRM, you can understand the knowledge of marketing. It is a large subject and science, and it includes all the "basic knowledge" related to marketing. Marketing does not simply focus on sales, but starts from the source of the product, and involves the product itself, product services, product promotion and other aspects. Its core is to focus on needs and desires, and value exchange. Therefore, I personally think that marketing-related systems or programs can be seen from the marketing degree. The core of marketing has three points: Satisfy the needs and Fax List desires of both users; Realize the value exchange between users; The value enhancement of the product is carried out smoothly. In addition to the three core points, in the process of implementation, there will be products as the carrier of our external exchange value.