Consumerism is the idea that increasing the consumption of goods and services purchased in the market is always a desirable goal, and that a person's well-being and happiness depend fundamentally on obtaining consumer goods and material possessions.
Consumerism is related to the predominantly Keynesian idea that consumer spending is the key driver of the economy and that encouraging consumers to spend is a major policy goal. From this point of view, consumerism is a positive phenomenon that fuels economic growth.
Others view the drive to obtain more material possessions as problematic, causing individual anxiety and eroding the social fabric.
Consumerism: Definition, Economic Impact, Pros & Cons [Investopedia]