Looking at cs879-2037.meraki.com, the first thing to understand is that this doesn't appear to be a normal website at all. The address points to a device on a Meraki network — likely a security camera, access point, or other networking hardware — that is publicly reachable but not intended for public use. The site returns a 403 Forbidden error to visitors, meaning it blocks anyone who isn't an authorized administrator.
The bigger concern is the invalid SSL certificate. Even if you somehow got past the access restriction, your connection wouldn't be encrypted. For any kind of device interface, that's a serious security risk. There's no company behind this, no contact info, no about page — because there's no business here. It's just a piece of infrastructure that's exposed to the internet in a broken state.
If you're researching 'cs879-2037.meraki.com reviews' or wondering 'is cs879-2037.meraki.com safe', the answer is that it's not a site you should try to interact with. There's nothing to buy, sign up for, or view. The safest approach is to avoid the address entirely.