The 5 most important SEO factors

(Following a reflexion comment, I want to clarify that the five factors below are not the factors directly influence the positioning but the result of a statistical study post-SEO., so please read carefully. If want to know the SEO factors to optimize to improve the positioning of your site, please read this article: Complete list of factors in SEO SEO )

What idea could link these four elements:

You found? 
The next time a SEO promises the first position on Google , ask him if his grandfather is a member of the pool (French secret services), and if his beloved grandmother of Kim Jong-il ( leader of North Korea) you can tweet the recipe for Coca Cola ...

Google's algorithms are so mysterious that a rational SEO and especially sincere could promise you to approach the three top positions in several stages.

The SEO, organic SEO or SEO is complex because positioning algorithms are not distributed and are constantly modified / optimized to give the user the best possible service.

However the SEO is an exact science! AJ Su, YC Hu, A. Kuzmanovic, and C.-K. Koh will agree with me as they have "tried" to understand the algorithms of Google ... I invite you to read "How to Improve Your Google Ranking: Myths and Reality" which presents a scientific approach conclusions on algorithms used by Google to locate a site.

In conclusion of this statistical study, the results are clear and precise.

Here are the top 5 influential factors in SEO :

1. The PageRank , off page work is essential
2. The domain
3. The tag title of the HTML header
4. The meta-description
5. The URL (without domain name)

As you can see below, the researchers considered a list of influential factors on the position:

• Page :
  • The score pagerank of the page
  • the age of the page
• URL
  • keyword in the domain
  • keyword in the URL (without domain name)
• Area
  • Domain size
  • Seniority in the field
• Header
  • Keyword in the title tag
  • Keyword in the meta keyword tag
  • Keyword in the meta description tag
• Body
  • Density of keywords
• Heading
  • H1, h2, h3, h4, h5
• Link
  • Keyword anchor text
  • Keyword in the tag image

The results are impressive: over 6,000 web pages, their positioning system is able to announce seven pages in the top 10 results for 78% of keywords.