In an instant, for each of your keywords, you will be able to see the Opportunity metric. Essentially, it is a measure of the value (visits and conversions) generated once in the top of Google search results, pinned against the difficulty of getting to those ranks. It takes into account factors such as the average monthly search volume, the estimated click-through and conversion rates, and the SEO difficulty.
Your keyword with the highest Opportunity will receive a score of 10 and all the other keywords will be rated on a scale of 0 to 10, relative to that top keyword.
Hovering on the pie chart will show you the data behind the calculation. You will see an estimate of how many additional visits and conversions you should expect from a top 3 position, alongside a useful comparison to how much the same results would cost in Adwords.
The Opportunity score is also integrated into the Keyword Research module. You will, therefore, be able to assess the opportunity of any new keyword - relative to your current portfolio - right from the prospecting stage, without even having to start tracking it.
In conclusion, through the integration of all these relevant factors, the Opportunity score takes the burden of spreadsheets and complicated calculations away from you, enabling prioritization decisions with an unprecedented ease.
Here's a video to guide you through the main available metrics in your SEO Campaign: