Watch my SSL is a service to monitor your SSL certificates and alert you when they are about to expire. Conceptually, it's pretty straightforward, but there's a bit of complexity under the hood. If you run into any issues, please contact us at support@watchmyssl.com and we'll be happy to help.
You can use the service for free, but there are benefits to subscribing. One of them is priority support, of course. Subscribers will be at the front of the line when they need assistance of have questions.
Regards,
The Watch My SSL Team.