1)      First most important factor for Search Engine Optimization, if you were to only do one thing for your site, is to ensure the targeted search terms or phrases be included in the title tag of the web page’s HTML header (the title that appears at the top of a browser page).

2)      Second most important factor is using the same targeted keyword terms within the visible html text (the site content) and the placement and html tagging of the terms.

3)      Third most important factor is the relevance of all other site content (text and links) in relation to the keywords. This means that it may prove ineffective to try and target keywords that are out of context with the rest of the content or with the content on your linking sites.