Levels of development refer to the various stages of economic and social progress that countries or regions experience. These levels are often categorized into three main groups: developed, developing, and underdeveloped nations. Developed countries typically have high income, advanced technology, and strong infrastructure, while developing countries are in the process of improving their economic conditions. Underdeveloped nations face significant challenges, including poverty, limited access to education, and inadequate healthcare. These levels can be assessed using various indicators, such as Gross Domestic Product (GDP), literacy rates, and life expectancy. Understanding these levels helps policymakers and organizations target resources and support to improve living conditions and promote sustainable growth in different regions.