There’s something strange with uptime robots: they don’t detect expired certificates. So even though you don’t get any messages that your site is down, it might be if your SSL certificate has expired… All browsers will block your site, or give scary warnings to users.
This happens because technically, your site is not down. It’s just that there’s no browser that will show your site without giving a lot of scary warnings.
If you have visitors on your site, they will go away quickly. You will drop from Google. So how to handle this? As of 1.0.27, Really Simple SSL pro has a certificate expiration warning option, that will send you an email when your certificate is expiring within two weeks. Every week your certificate is checked, and the valid to date is registered.
This way, you will get an email when your certificate is expiring soon, so you can take appropriate action. Already have Really Simple SSL pro? Then you can just update the plugin, and you will get this option automatically added to your settings. To enable this feature you only have to click the checkbox, save, and you’re done!