How do I add a URL to one of my tracked keywords?

[AllChargedUp]

In other words, if one of my tracked keywords doesn't currently have a URL associated with it / assigned to it, how do I add a URL to it?

[dave.kudera]

In the main rankings section of your Campaign, the related URL is automatically populated with the highest ranking URL for that particular keyword- this URL can't be updated as it is pulled directly from the SERP at the time of the data collection.

That being said, if you'd like to see how a particular page is ranking for that keyword, there are a few ways you can see that info. The first would be in the Analyze a Keyword section. Here you can select "keyword performance" from the drop down to see the top 5 ranking URLs for that keyword on your site.

The next would be in Page Optimization. Here you can create a pairing of a keyword and URL from your tracked site and we will show you how well optimized that page is for that keyword along with the rank. The rank will then update weekly and will be able to be seen in your Page Optimization's "track and monitor" tab.

I've got a few guides to help get you started with these tools:
https://moz.com/help/moz-pro/page-optimization/overview
https://moz.com/help/moz-pro/rankings/analyze-keywords