There is a brief description of the new property features on the Tizra customer wiki:
https://github.com/Tizra/Tizra-Customer-Tracker/wiki/Property-overrides
This should help you get started until the manual has been updated. Let us know if you have any problems or if it sparks any great ideas.
While search engines are one important reason for meta tags, this feature also makes LOCKSS archiving easier to configure, something that our academic customers have been asking for.
-- David