In an information-rich world, attention is the scarce resource. This article examines how the attention economy works: the business models built on capturing and monetizing human attention, the design patterns that exploit cognitive vulnerabilities (infinite scroll, variable reward schedules, social validation loops), and the societal consequences including shortened attention spans, political polarization, and mental health impacts. It also explores alternatives — attention-respecting business models, humane technology design, and the growing movement for digital minimalism.