Forum Moderators: mack
keywords not on the webpage may cause you to become penalyzed by the engines for keyword stuffing
You may read that advice around the web because it was true at one time on some search engines, but I don't see any evidence at all that it is the case today. In fact some engines recommend that you use keywords meta tag for synonyms and alternate spellings.
In general, the impact of the keywords meta tag on search rank is quite small today, and it's just beginning to rebound from being ignored completely. For a while, the keywords tag was so spammed out as to be of no value at all to the SEs. So I suggest using a short keyword list that "hits the high spots" - but definitely keeping it specific to the page rather than using the same tag everywhere.
I think of the keyword meta tag as a place to keep a record of which words and phrases I am targeting on the particular page. But it's not worth a lot of concern.
I think it still makes sense to use them on your importaint pages.
Back to your origional question...
If you are going to use meta tags such as description and keywords, you should make then unique to each page. More importaintly, relevant to the page.
Your meta tags refer to the page, not the site.
Mack.
<edit for typo>
[edited by: mack at 7:00 am (utc) on July 24, 2005]