Quote:
Originally Posted by Terry Van Horne
Note on the keywords tag... by the HTML spec it can only contain... if memory serves me... 1024 chars.
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If I remember well too you are right.
Quote:
Originally Posted by Terry Van Horne
I've believed Google still indexes keywords just not for ranking... big ole red flag...
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You are absolutely right!
OLE RED FLAG!!! 
Quote:
Originally Posted by Terry Van Horne
if too big, too many repeats (it was 3 repeats of any word back in the day). You also don't want the repeated words too close together. Should alsoi note that on Mike Grehan's newsletter he did an interview with a Yahoo! engineer who said they use it, especially for slang, alternate meanings possibly mispellings, multiple spellings etc. That I've tested and it does look to be true but... nothing is written in stone.
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In 2006, Google came up with a new algorithm called "
Phrase Rank", which is a process of indexing including identification of phrases and/or related phrases.
Google possesses a very effective method against manipulation attempts such as with the well known nonsense method "keyword density" or the "dynamically generated" keyword-rich web pages. Having a keyword density which is very high could result in triggering spam filters on a search engine, drastically reducing your chances of getting high rankings.
Good phrases are the ones that occur quite frequently across the indexed documents or have a distinguished appearance.
We should be certain that you have structured themes in your content, and that you include a supporting cast of semantically connected keywords. Reference Google's patent number
7,249,121 — Identification of semantic units from within a search query.
All that said, you should consider placing only targeted keywords found in your page content
(NOT WEB SITE CONTENT) into your keywords meta tag in order to achieve 100% relevancy to your page content.
Also a highly respected
SEO Eric Enge have made a research and tests and he came to the conclusion that the safest way is to implement only 4 keywords, and if more necessary, no more than 8. And personally I adhere to his findings.