behavioral nudging & choice architecture

​Amazon doesn't just show you products. It shows you "Only 2 left in stock" and "4 people are viewing this right now." Swiggy doesn't list restaurants neutrally - it leads with "Order again?" because re-ordering requires zero decision-making. Zepto's checkout defaults to a tip for the delivery partner, already selected, already highlighted in green.

​None of these are accidents. None involve force. They work because human beings don't make decisions the way economics textbooks say we do - we're shaped by defaults, social proof, loss aversion, and how a choice is framed. Behavioral design is the science of engineering those influences - deliberately, at scale.