Are you talking
SEO for itself, sort of play of words densities?
I thought, you are developing a thread about
SEO for income.
SEO for sales page can have a low contextual keyword density.
More important for marketing for money is:
1. relevance of content - sometimes is referred by Google as quality score (take a pick what that keyword density should be -even 0 density works. When product is in demand - it sells. When product is unique, it has no competition) The quality score zooms on relevance of both keywords and content to context.
2. popularity of keywords - this I call "competitive relevance". There is 1 bln pages registered under some keyword o phase, and very few people visit them...When you will add up one more page to that group, your page won't have visitors even if you ended on #1 spot.
3. If your aim is not market popularity in view of income/earnings,
ask yourself what is other purpose of doing
SEO on your pages? Self relevance? Teasing intellect or senses? Self indulgence? Science? (worst kind, the free markets are pretty unscientific, science of contextual sematics doesn't exist...) Society acknowledgement of your eloquence? Do you feel better on the account of acknowledgment only and without earning money in the process? Although the last one may work for some individuals, it doesn't work for others - on Net especially it can be seen clearly that almost all variants go, including idea of putting a price for
bad ebooks, fluff - and opposite - giveaways of items for FREE.
So what is that price for written text? Why we give it away
for FREE or charge for it?
There of course exist opportunities to earn money for little effort on Net but others have to work for it even on Net. Also - the
SEO related activity is not the only income producing variant of businesses on Net.
I am not a fan of vaguity, just give a valuable information to deliver sales - this is better. Otherwise, I am pretty certain to not to survive to end of discussion (have no much time)
Jan