Search Engine Algorithm Top Organic Rankings are won by placing optimized content on a trusted domainand then promoting that website page to win direct links across the internet with a wide variety of related keywords to build link popularity. Source: http://www.seomoz.org/article/search-ranking-factors
Site Wide Link Based Ranking Factors Site Wide Link Based Ranking Factors Trust Distance Link Popularity Link Diversity Topical Relationship Temporal Growth Restricted TLDs Purity of Links Source: http://www.seomoz.org/article/search-ranking-factors
Trust Distance Click distance from Trusted Sites. Links from popular, trusted websites pass more value.
Link Popularity PageRank is a link analysis algorithm that assigns a numerical weighting to each element of a hyperlinked set of documents with the purpose of "measuring" its relative importance within the set.
Link Diversity The relationship between the total number and variety of Linking Root Domains. Open Site Explorer includes 9.2 trillion links from 92 million domains. They have crawled 42 billion URLs in past 30 days.
Topical Relationships Links from trusted sites in the same topic or from relevant related sites.
Temporal Growth of Links Older links are often viewed as better than newer links. Link spikes can look unnatural to search engines. Majestic SEO has built an independent index of the internet to quantify link profile. Last crawl = 320 Billion Pages Crawled.
Page Specific Link Based Ranking Factors Page – Specific Link Based Ranking Factors Anchor Text Link Popularity Link Diversity Trust Distance – Not as important at page level Topical Relationship Internal Anchor Text Source: http://www.seomoz.org/article/search-ranking-factors
Anchor Text of Inbound Links The strongest page based ranking factor is anchor text. Source: http://www.seomoz.org/article/search-ranking-factors
Anchor Text Distribution Anchor Text should reinforce the theme of the website and contain a natural distribution of both brand and descriptive keywords. Source: http://www.opensiteexplorer.org/
Other Link Based Ranking Factors Google has stated that Restricted TLD extensions (.edu, .mil, .gov, etc)do not pass any more value than others. Link schemes such as links to bad neighborhoods on the web or excessive link exchanging can negatively impact your site's rankings. Buying or selling links that pass PageRank is in violation of Google's Webmaster Guidelines. Paid links can negatively impact a site's ranking in search results. Nofollowwas developed by Google in 2005 as a method to identify a link that should not influence the link target's page rank. Originally developed for blog comment spam and later used to clearly identify paid links. Google & Bing look at social signals as a ranking factor, but that those signals are weak and may only apply to “Real Time” results for now.