Adalysis will track the conversion rate of all your landing pages and will notify you when they don't meet minimum default criteria (which you can customize if needed). Alerts will be shown on the dashboard (under Audit Alerts / Landing Pages):
Click on the button to analyze the issue in detail.
You can then examine the performance data as well as see which keywords (and their landing page experience quality score) are driving traffic to the page. This will help you determine where to focus your efforts of changing the keywords, ads or the landing page itself.