SEO or search engine optimization factors that help in getting higher rankings can be easily classified as the on-page and the off-page SEO. While the on-page SEO usually deals with the areas like optimization of keywords, content, description and title, the off-page SEO is basically the factor that is done outside the world of concerned web page, primarily on the website of other people.
The crucial on page as well as off page SEO factors that contribute in achieving higher search engine ranking includes total link number that points to your site, the duration of a site being on the web, website design, rich content, strength of the monthly maintenance strategy, targeted key words and phrases and magnitude of present web existence.