docs/virtualbox: update skip_export wording

website/source/docs/builders/virtualbox-iso.html.md

@@ -271,9 +271,9 @@ builder.
     doesn't shut down in this time, it is an error. By default, the timeout is
     `5m`, or five minutes.
 
--   `skip_export` (boolean) - Defaults to `false`. When enabled Packer will
-    skip export of the installed virtual machine. Only useful for some edge
-    use cases.
+-   `skip_export` (boolean) - Defaults to `false`. When enabled, Packer will
+    not export the VM. Useful if the build output is not the resultant image,
+    but created inside the VM.
 
 -   `ssh_host_port_min` and `ssh_host_port_max` (integer) - The minimum and
     maximum port to use for the SSH port on the host machine which is forwarded

website/source/docs/builders/virtualbox-ovf.html.md

@@ -229,9 +229,9 @@ builder.
     doesn't shut down in this time, it is an error. By default, the timeout is
     "5m", or five minutes.
 
--   `skip_export` (boolean) - Defaults to `false`. When enabled Packer will
-    skip export of the installed virtual machine. Only useful for some edge
-    use cases.
+-   `skip_export` (boolean) - Defaults to `false`. When enabled, Packer will
+    not export the VM. Useful if the build output is not the resultant image,
+    but created inside the VM.
 
 -   `ssh_host_port_min` and `ssh_host_port_max` (integer) - The minimum and
     maximum port to use for the SSH port on the host machine which is forwarded