HTML meta "keywords". Worth including?

Do you use "keywords" meta in your site, knowing that Google does not use them (and 开发者_高级运维has no plans) in page ranking, and perhaps even search?

Yes you do; Google is not the only search engine in the web although its has the major market share. There are other engines including Yahoo which use the Keywords META to some extent.

No. I don't want competitors knowing what I am trying to rank for. Keywords are very valuable in some markets. If you found a good keyword phrase that is converting well (and your competitors don't know about it) do yourself a favor, and keep a monopoly on it.

That is NOT a reason to abandon keywords altogether.

They are still indexed and searchable, and so still have a function.

Yes, we do. No one knows the exact Google (or any other search engine) algorithm.

In addition, lots of companies use "keywords" for internal websites that host tons of Html generated content.

I've heard from so many people that Google doesn't use meta keywords, I'm not sure I'm convinced of that however. But, whether they do or they don't you should still use them because Bing and Yahoo (the other 2/3 or the big 3) still do use them. But remember to limit your keywords because (based on popular opinion) none of the 3 engines read past character 46.

I did, because I didn't know that fact. Now I am thinking that is not worth doing so insignificant I see the "energy conversion efficiency", even if we don't take Google in consideration, other SE seems do not take much attention to it...