How many duplicate keywords on one page is to many or to less? For instance I want people to search "stuff" because my site is about stuff, how many times can I use the word "stuff" before google thinks I'm trying to trick the bot and how little is to little to use the word "stuff"?
as long as you don't stuff kw... it doesn't matter how many times you use it especially if you have may product that requires to have that particular kw.. as long as it is necessary.