Social class refers to the division of society into hierarchical groups based on factors like wealth, income, and occupation. There are typically considered to be three main social classes: upper, middle, and lower. The upper class includes the wealthy and business owners, the middle class consists of white-collar professionals, and the lower class is made up of blue-collar workers. Social class influences consumer behaviors related to clothing, leisure activities, spending habits, and more. However, social class can be difficult to define and measure, as income and dual incomes have blurred traditional class distinctions.