Paid keywords is a metric pulled from SpyFu that gives you an absolute metric for the total number of unique paid keywords that have been seen for your domain. According to SpyFu, one of these keywords is searched on Google, and it shows your website’s ad in one of its top 22 paid results.
This metric allows you to compare the total number of paid ads are being shown for a list of keywords and can be considered a metric of how discoverable your website is from Google’s paid channel.
With Pulse, you are able to track the number of paid keywords your website is discoverable on in comparison to your competitors. Similar to that of ‘Estimated Ad Spend’, we suggest utilizing this metric in unison with estimated ad spend and estimated monthly PPC clicks to pull insights on your competitors' PPC performance.