Hello,
Treat it as a friendly name of the certificate where you have to enter parameters like:
DC - domain component
CN - common name
OU - Organization Unit
O - Organization
L - Locality
ST - State
C - Company
This is how certificate is identified.
An example of it is as below:
DC=<Domain component>,CN=<Common-Name>,OU=<Organizational-Unit-name>,O=<Organization-name>,L=<Locality>,ST=<state>,C=<Country>
e.g. DC=test,DC=COM,CN=Rushi,CN=admin,OU=forum,O=xyzcorp,L=Bangalore,ST=Karnataka,C=IND
Regards,
Rushi