Class systems are social structures that categorize people based on their economic status, occupation, education, and social connections. These categories often include the upper class, middle class, and lower class. Each class has different levels of access to resources, opportunities, and privileges, which can affect a person's quality of life and social mobility. In many societies, class systems can influence everything from education and healthcare to political power and cultural norms. People in higher classes often have more opportunities for advancement, while those in lower classes may face barriers that make it difficult to improve their situation. Understanding class systems helps us recognize the inequalities that exist in our world.