The article discusses the evolution of consumer buying behaviour and consumption in contemporary times. It explores various theories such as the Source Credibility Model, Social Identity Theory, and Self-Image Congruence model to understand how personal identity influences consumer behaviour. The article provides examples of how personal identity influences the purchase of products such as the Gopro hero 7 camera, Vespa Primevera scooter, and stand up paddle boat. It also discusses how societal consumption patterns influence consumer behaviour.