A data series is a group of related data points plotted in a chart.
Try it with AIIn Excel, a data series represents a single row or column of data that is visually represented by a specific color or pattern in a chart. Multiple data series can be plotted on the same chart to allow for comparison between different categories or time periods.
In a bar chart showing annual sales, the '2023 Sales' column acts as one data series, while the '2024 Sales' column acts as a second data series.
Right-click the chart, select 'Select Data', and click 'Add' under the Legend Entries (Series) section to define the new range.