Great question. Next to Uptime monitoring we also monitor your website Speed performance and Health performance.
Every week we scan your website for 404 errors and mixed content violations and SSL Health.
Every week we monitor your Google Page Speed score and Server ping times and store historical data.
We also build a very powerful, but simple to use notification system. For example, we gave you the option to receive an email when your website assets (css, js, images e.t.c) exceeds a certain limit. Or when your Google page speed score is lower or higher than x.
And we think that it doesn’t hurt to invest some love in great UI ;-)