What is the primary purpose of using sparklines in Excel?

The primary purpose of using sparklines in Excel is to visually represent data trends within a cell. Sparklines are small, simple graphs or charts typically inserted within a single cell, allowing users to quickly understand the trends and variations in data without requiring the space or detail of a standard chart. This compact representation helps users to see patterns, fluctuations, or overall trends at a glance, making it easier to analyze data alongside textual information.

Sparklines are particularly useful in reports or dashboards where space is limited, yet there is a need for quick visual cues on data performance or trends. They serve as efficient tools for data visualization, conveying insights without overwhelming users with too much information.