Data Labels make an Excel chart easier to understand because they show details about a data series or its individual data points.
Depending on what you want to highlight on a chart, you can add labels to one series, all the series (the whole chart), or one data point.
In our example below, I add a Data Label to a column chart and then I format the data label using CTRL+1.
I then select to custom format the numbers so it shows the values as thousands by adding a comma , after each zero and then showing the work k by adding “k”
Example Custom Number Format: [$$-1004]#,##0,”k”;-[$$-1004]#,##0,”k”