SEO (Search Engine Optimization) Factors (Source SEOMoz.org)

Hey everyone.  I had previously came across this article on Search Engine Ranking Factors for 2011.  I don’t believe the 2012 one is out yet, however this article still makes sense and is worth sharing.  The article is from SEOMoz.org, a great source for tips, and information on Search Engine Optimization. Great resources.

Here is the article:

Welcome to the 2011 edition of the Search Engine Ranking Factors. For the past 6 years, SEOmoz has compiled the aggregated opinions of dozens of the world’s best and brightest search marketers into this biennial, ranking factors document. This year, for the first time, we’re presenting a second form of data – correlation-based analysis – alongside the opinions of our 132-person panel.

Over the pages of this document, you’ll see segmentation of the search ranking algorithm into various components like “page-specific, link-level features,” or “domain-level, keyword-agnostic features.” These segments represent the different elements illustrated on the pie chart to the right. In each segment, you’ll see three types of charts.

Survey Data Graph

The first, excerpted above, shows the opinions of SEOs on factors in a given segment, ranked in order from those the panel believes (on average) to be most important to least.

Correlated Data Graph

The second, also excerpted above, shows SEOmoz’s analysis of 10,271 keyword search results from Google.com (US). The numbers shown are mean Spearman’s correlation with higher rankings, meaning that a higher number indicates that websites + pages with the given feature (or more of the given feature, as in cases like “# of links”) tended to rank higher on average than those without. Remember – correlation is not causation! Just because pages/sites with a given feature tend to rank higher doesn’t necessarily mean that this particular feature is the cause of that higher ranking.

The last chart, Future of Search, is illustrated fully below and uses aggregated opinions to show the mean answers to specific questions about SEO tactics or predictions.

We hope that by opening access to this analysis (including the raw data here) to provide greater access to information about how search engines may rank documents and empower marketers to have both statistical and opinion-based data to help validate their own efforts. If you have feedback or suggestions, please leave them as comments at this blog post.

Thanks much!
Rand Fishkin, CEO, SEOmoz

The complete article and more may be found at:http://www.seomoz.org/article/search-ranking-factors