This document discusses the differences between trends and fads. Trends are emerging phenomena that last for long periods of time and are passed down through generations. They are composed of complex ideas from various fields. Trend analysis examines trends and predicts their future impact. In contrast, fads are very popular interests or styles that only exist for short periods of time. They spread quickly but do not have long-term staying power. Examples of past fads include pet rocks, mood rings, and beanie babies.