This article focus to Define and Discuss on Consumption. Maynard Keynes established this consumption function indicating that the most determined factor of consumption spending is throw away income; that is income after subtracting the amount of taxes. However, other factors may effect on the consumption function, seeing that culture, religion, education, area, family size, and composition. Other factors are varying as time passes. The consumption function is often a single mathematical function utilized to express consumer spending.