The document discusses trends, including their key elements and characteristics. It defines a trend as a pattern of change over time that can be observed in data. Trends have elements like the number of participants, patterns of behavior, and lasting a long period of time. They also have causes that start them and consequences from their impact. The document outlines different types of trends from microtrends to gigatrends, with examples given. Microtrends are small, observable changes while megatrends are large shifts that affect many people over decades. Understanding trends requires analyzing these elements and characteristics.