I am trying to optimize my site for search engines. I have looked some articles in this regard as i am still new for SEO. Now i am stuck up with the keyword density issue and have some doubts regarding this:-
1) Is keyword density still useful for a website as some article authors say yes and some say that it is the thing of past.
2) If at all it is useful then how much in percent shall i use in a web page.
3) How many keywords should be a limit for using in meta tags.
4) what should be the limit of the keyword (one word OR two words OR more)