Enable the Feature:
Admin home > Features > Global Features > Additional > Share

To access: Click the Share icon on the Admin Panel
or access http://example.org/tiki-admin.php?page=share

Set it up in the Share admin panel:

Click to expand

Once enabled the feature, all pages will have a new icon on the top right corner, to allow the user to share this page with others:

Click to expand

Once you click there, you will be offered some options to share the page with, depending on the associated features (internal or related to external social networks) which are already enabled and configured in your site.

Click to expand

Share with access rights

This feature is useful when sharing content that is not publicly available. The recipients will inherit user's access rights for the shared resource only.
Preferences required: auth_token_access and auth_token_share.

Related:

• Social Networks
• Tell a friend
• PluginShareThis