What is the significance of 'Secondary Dimensions' in Google Analytics reports?

The significance of 'Secondary Dimensions' in Google Analytics reports lies in their ability to provide an additional layer of data for deeper analysis. By adding a secondary dimension, users can slice and dice the primary data in a way that reveals insights not evident from the primary dimension alone. For example, if the primary dimension is 'Source', adding a secondary dimension such as 'Country' allows you to analyze traffic from different countries within each source, thereby uncovering specific patterns and trends that would otherwise be obscured.

This capability enhances your understanding of user behavior, engagement, and conversion, enabling more informed decision-making based on comprehensive data insights. The use of secondary dimensions is essential for gaining richer insights into the relationships between different types of data.