Only Missing in SMF but default at vBulletin, WBB, IPB and myBB.
Please integrate Meta Tag Fields to AdminCP to integrate them in every selected Theme (Header).
I think Keywords and Description ist enough. ;)
This is a good idea especially if you have lots of templates or cannot manually edit files.
Some scripts (e.g. Joomla) put meta tags in the db. This increases querys (66 for a default joomla page load!!). Maybe it could be added as a php variable in settings.php
I have that on my SMF For Free site. For keywords I store that information inside the setting.php The only hard part to this is getting the theme authors to use it. I had to edit all the themes that I am using.
@vbgamer45 - and that is the Reason why every Boardsoftware around is changing it to bringt it to the index.php !