When working with IIS websites that use SSL, certificate management can often become difficult. The initial setup for one server or site may be simple, but every time you add or replace an IIS host, you need to confirm the SSL certificates are copied over and imported on the server. Additionally, when the certificate expires, the new certificate must be copied to all hosts that need it, and reregistered.
New in IIS8 is the ability to create a centralized certificate store that hosts certificates for all the websites in one place. Instead of manually copying and installing the certificates to each server, the web servers then simply access the centralized store and download the files as needed.