Instead of creating individual share requests, you can share items with a distribution list. Your system administrator sets up distribution lists and when you share an item with the list, you notify the administrator. The administrator publishes the shared item to the list.
When a new shared item is published, existing members of the list are automatically notified of the new shared item. Everyone in the DL has the same share privileges.
When new members are added to the distribution list they can be automatically notified about the items that are shared with the list and users can click Find Shares in the Overview pane to see the shared items that were published in distribution lists they are members of..
When a member is removed from the DL, the share privilege is revoked.