Tracking market segment growths helps you stay on top of trends and gives you an advantage in targeting. As a particular market segment starts to gain traction, or decrease in volume, you can adjust how you interact with that specific segment. To measure revenue growth, on the other hand, use metrics such as ARR Growth Rate.
Example of KPI target
CEO, Sales Manager
Sales growth rate by market segment
[(Value of sales acquired in current period for a particular segment - Value of sales acquired in the previous period for the same segment) / Value of the sales acquired in the previous period for the same segment] x 100