After you’ve purchased the SSL Certificate, you’ll need to accept the certificate. There are several levels of verification required before it’s issued; however if we take the example of Domain SSL, it is possible to issue the certificate immediately. Domain SSL can be issued in a matter of minutes after the owner of the domain confirms the email address of his/her domain owner.
This is done by the SSL issuer; the issuer sends an automated email to one of a pre-determined set of email addresses such as [email protected].
If your hosting is shared the hosting provider can assist you in the way it manages the server. They’ll set everything up for you after you’ve signed the certificate.