Continuous monitoring of views, unique landing page visitors and leads (conversions) gives you a general representation of how your landing pages are performing and allows you to make general conclusions, especially when comparing the results that you're seeing from a few pages addressing similar keywords, or targeting similar audiences. As a quick reminder, be sure to be always taking into the account the budget spent on generating and leads.
Obviously, you should be monitoring your landing page conversion rate from visitors into leads. However, instead of looking at the state-in-time data, consider keeping track of the conversion rate dynamics. That way you'll have a much better understanding of how your landing pages are actually converting, since the results will be more normalized.
Here we’re talking about an additional layer to the metrics that we already discussed. Having Views, Unique Visitors, Leads and Conversion Rate by country helps you identify the GEO areas where you should scale your campaigns and areas where you should put them on pause. And the performance by device – desktop, laptop, tablet and mobile helps you discover what version of your landing page needs more optimization work.