Large monthly search volume. So the reward of ranking no.1 is a lot of traffic. As a rule of thumb ranking first will give you 50% of the traffic, while ranking second will give you 12%. 3 and beyond, while on the first page, will be 7% of traffic or less. So as a rule of thumb, ranking on first page will give you ~10% of traffic, and normal conversion rate will be 2%. If you know your average order value (AOV). Then you can work out the revenue expected when ranking on the first page. This way you can prioritize keywords easily.