This document discusses how neuroscience can help decode user experience on websites. It suggests that neurophysiological measures like eyetracking and emotion detection can provide 1 GB of data per user hour to help designers optimize websites. Metrics like cognition, attention and emotions can be measured and used to identify optimal and negative user experiences on different website designs and applications. The document provides examples of how eye tracking heatmaps and emotion detection can help adapt interfaces in real-time to improve the user experience.