Data visualization is key to understanding your metrics. Here are some common types of charts and graphs used in email marketing: - Bar Charts: Perfect for comparing metrics across different campaigns or time periods. - Pie Charts: Useful for showing proportions, such as the distribution of different types of clicks or the breakdown of subscriber demographics. - Line Graphs: Ideal for tracking changes over time, such as open rates or CTR trends. - Heat Maps: Show where users are clicking within your emails, helping to optimize link placement.