1 of 1 people found this helpful
A step chart can be used to highlight a significant change between data points through vertical lines.The horizontal lines represent periods of time where the data is constant. It doesn't really matter whether you use a line chart or a step chart in the example you attached, but they are useful when your data isn't continuous, e.g. when it changes at irregular points in time. What looks like a continuous increase in a line chart, will be displayed as a constant line in a step chart.
Tableau supports step charts natively and you can read more about them here.
Thank you, Luisa! This is very helpful.
Glad I could help!