Missing information refers to the lack of some information in an information system or information model, which makes it impossible to make complete and accurate analysis, decision or processing of related issues. In information systems or models, complete and accurate information is very important, because only by obtaining sufficient, complete and accurate information can we formulate correct strategies and make wise decisions.

Missing information usually leads to uncertainty, risk and misunderstanding. For example, in the financial market, failure to obtain important economic, political and other information in a timely manner will lead to misjudgment and risk in investment decisions; in the medical system, the lack of complete medical history and medical briefings of patients will affect the accuracy and effectiveness of treatment plans; and in corporate management, the lack of market and customer information will affect the company's marketing decisions and strategic planning.

In order to avoid the problem of missing information, a good information management and collection system is required. The information management and collection system should be able to obtain, store and manage various types of information in a timely and accurate manner, including structured data and unstructured data, in order to achieve accurate decision-making and data analysis.