Moz 2013 Search Engine Ranking Factors

A study of over 100 SEO Professionals on Google's search algorithm has found:

1.  Links are still beleived to be the best important part of the algorithm (approximately 40%)

2.  Keyword usage on the page is still fundamental, and -other than links-is thought to be the most important type of factor.

3.  SEOs do not think social factors are important in the 2013 algorithm )only 7%), in contast to the high correlations.

See more results:

http://moz.com/search-rankinf-factors/survey