Keywords are like puzzle pieces to search engines, every word used on a webpage contributes to the picture of what a site is all about.Used in the appropriate densities, it is these keywords that will ultimately determine how many people you can reach through the search engines. Users type in keywords in the Search field to find what they are looking for.The search engine then reach into its database to find the most relevant result.Relevant result are driven by different factors, mainly by keywords, but also by traffic and the number of links pointing in from external websites.
Please put all of your points in one post instead of making 5 threads in one forum straight after one another. It knocks other threads off the page, and is very inconsiderate to other users.