I have used Weebly in the past (not anymore). When made a new subdomain in there, it was all instant and good and stuff and you know and whatever. I understand how they’re secure (Wildcard Certificates), but what I don’t understand is how they server my subdomain so quickly. In my experience, every time I made new subdomain, I needed to restart the server (Apache). But how does Weebly restart their server without the website being affected overall? Does it restart every time a new subdomain is created? Or, is there a method that doesn’t require the server to restart?
Basically, how do websites that create subdomains for you work (server-wise)?