Certificate revocation lists (CRLs) are used to distribute information about revoked certificates to individuals, computers, and applications attempting to verify the validity of certificates.
The Revocation List tab lists the serial numbers of certificates that have been revoked and the date they were revoked. The Revocation entry field may also provide information about the reason a certificate was revoked.
The General tab provides additional information about the CRL itself, including the CA that issued the CRL, when the CRL was issued, the date the next CRL will be issued, and the name of the CRL distribution point.
Additional references