This research addressed the relevance of the implementation of the ABC classification method for inventory management in both national and international companies, and how it can help to obtain benefits to improve inventory management and to improve decision making. The purpose of this research is to analyze the importance of inventory management in companies through the ABC method, using an exploratory-descriptive design with a qualitative, analytical and documentary paradigm. The population and sample consist of related documents with the ABC analysis and inventory management, available in the academic Google database, of a non-probabilistic, intentional type. As a research instrument, a documentary review guide was chosen. According to the analysis, it is concluded that the ABC classification allows companies to identify weaknesses in their inventory system, therefore they are able to reduce costs, improve decision making, establish efficient and effective inventory policies, train their staff, and improve customer service and sales, by using the company resources efficiently.