Keyword analysis is one of the major task done while doing SEO for a site. Everyone has a different way of choosing keywords for there site. The keywords must be related to your site theme, they must have a search volume. To work on keywords the keywords must be categorized, so that we should know which keywords needs to be worked on most. They can be categorized into Primary, Secondary and Tertiary according to search volumes, exact counts etc. Each page of the website must have some specific keyword targeted for that page that way we can target more keywords for our site.