Alright i'm not sure if anyone has the answer to this, save google, but does anyone know if google determines keyword density based on ratio of a specific keyword to all of the text on a page, or from all the keywords shown in content combined in ratio to all of the text on the page? If the first one is true, then what defines a keyword? Or, in other words, are not all words, keywords for something?
I believe they would look at all text on the page, including alt text. I don't think keyword density is something to stress over though. Many people believe it is an outdated algorithm factor.
Keyword density is not being used AT ALL for your rankings. There are so many discussions going on here about keyword density, why not use something called SEARCH?
Keyword density is a "recommendation". But is overrated as an SEO requirement. It was assumed if you matched the Top 10's % then you will be ok. Now it is low on the SEO list of thing to do.
No, it's not even a "recommendation", it is nothing. The comparison with the "top 10" alone is bullshit. That implies there is some "optimal" keyword density which varies by topic instead of a set percentage. Does it make sense that a topic like "weddings" would have a different recommended density than "cars"? No? The entire "keyword density" myth is full of holes.