Neuromarketing is a field that uses neuroscience techniques like fMRI, EEG, and eye tracking to understand consumer decision-making by measuring brain activity in response to marketing stimuli. It aims to better meet consumer needs and inform product design, packaging, advertising, and more. Neuromarketing emerged in the 1990s and uses methods like fMRI, EEG, eye tracking, and facial coding to learn which parts of the brain are activated by different marketing elements. Both pros and cons are discussed, with pros being more reliable results from smaller samples and insights to improve marketing, while cons include potential concerns about manipulation.