Search Engine Optimization is a ever changing algorithme owned by search engines. These search engines allow different variations of SEO. E.g. KEYWORDS - Googles algorithme may allow you to use 4 or 5 keywords on a single page before punishing you for using to many keywords known as keyword stuffing. Where as Yahoo may let you use as many as you want, to help them decern what type of web page it's spiders are viewing. Also the amount of times you use your keywords in a page is important, to many times and the page will get ignored by google. But loved by other search engines. Other important SEO facts: Url - The url should be the main keyword(s) for your website or web page. E.g> http://free-backlinks.web free backlinks is your main keyword phrase for this site. Page Title - The page title should have your main keyword(s) in it. Description - This is very important to your web page and should have your main keyword(s) in it 1 or better 2 times. This description is the free advert placed on the search engines and to get ranked well the search engine spiders need to know what your website or web page is about. Heading1 and heading2 must have the keywords. Also a internal page link that is your keyword(s) is a massive benefit to rank high with search engines. So as you can see you need to take SEO very seriously. The search engines do! they have spent massive amounts of money on building there algorithmes, so you should spend a little time finding out what SEO is about.