Modify document.

lipingxue · Jan 30, 2024 · 8650e18 · 8650e18
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diff --git a/docs/self-signed-certificate.md b/docs/self-signed-certificate.md
@@ -8,7 +8,7 @@ To keep consistency with velero, Velero plugin for vsphere also supports using v
 * Guest cluster: supported since v1.1.1
 * Supervisor cluster: not supported
 
-To install with a storage provider secured by a self-signed certificate, the --cacert option needs to be added to provide a path to a certificate bundle to trust.
+To install with a storage provider secured by a self-signed certificate, the --cacert option needs to be added to provide a path to a certificate bundle to trust. This certifcate is used to verify TLS connection to the storage provider when backing up and restoring.
 
 Here is an example install command:
 ```text