What chart type is best for displaying changes in impressions, clicks, and conversions on a weekly basis?

A line chart is ideal for displaying changes in data over time, particularly for continuous data points. In this case, tracking impressions, clicks, and conversions on a weekly basis involves analyzing trends and patterns across a time series.

Line charts excel in illustrating this type of dynamic data, allowing viewers to easily observe how values rise and fall from one week to the next. The connected points in a line chart emphasize the movement and progression of the data over time, making it straightforward to identify trends, seasonality, or anomalies in the data.

Other chart types, such as bar charts, can represent individual weekly values, but they may not effectively show continuous changes or trends as clearly as a line chart can. Donut and pie charts are primarily used for displaying proportions and parts of a whole, which isn't suitable for illustrating changes over time. Thus, the line chart is the most effective choice for visualizing weekly changes in impressions, clicks, and conversions.