How to meet Google’s requirements
If you want to get high rankings for a special keyword, you must optimize one of your web pages for that keyword. If one of your web pages has been optimized for a keyword, then Google will return it in the search results. Unfortunately, there are many websites that target the same keywords as your website. If more than one website has been optimized for a keyword then Google will list the web pages with the best inbound links in the top 10 results.
For example, if 20 websites have been optimized for the keyword “green widgets” then the website that has the most inbound links that use the text “green widgets” as the link text will get the best position on Google. If your website meets all on-page requirements and has the right kind of links (which does not mean that it must have the most links) then Google will list your website on the first result page.