How many keywords are used meta keywords tag for seo?

 Every search engine(Google,Yahoo, being, Alo...) sets their own rules.no official limit on the number of meta keywords you can have. 

As a general rule, you should aim for the following character limits within each of your webpage meta tags:

• Page title – 70 characters
• Meta description – 160 characters
• Meta keywords – No more than 10 keyword phrases

It's very important that you add the keywords you want your website  to be found under in your KEYWORD tag.

If a search engine(Google,Yahoo, being, Alo...) spider finds the same words on your webpage and in your meta tags, these words will be ranked higher in the search index. Don't add too many words on you web page, the most search engines will only index the first 20 words. Make sure that you put or add the 10 most important keywords first.

However, it is a good practice to have less than 10% of the total words of a web page. for an example your web page has 300 words it is better to have maximum 30 words in your meta keyword tag. Otherwise could be considered overstuffing.

The only real use is to remind you of the keywords(Aritcal/Sentence  focuse) and keyphrases you have optimized for on that webpage.

Have also in mind that if you place a large number of keywords just for some search engines(Google,Yahoo, being, Alo...) to see, you could end up ranking less in the others.

Try to give each webpage of your website a relevant title tag, description tag and keywords tag that correspond with the text on your website. A visitor will find the exact information within your website, on the correct webpage.

Search engines like (Google,Yahoo, being, Alo...) show meta tags in their search results. You perform a search task by filling out:

• List item certain keywords. The results you will get is
• the title tag and
• List item the small text item, the description tag.