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Top 10 Lessons from 2010:What we’ve learned about SEO in the past 12 months.Rand Fishkin, CEO & Co-founder, SEOmozDcemeber2010
#1: Social Sharing Influences Search
Direct from the Source:Danny Sullivan: If an article is retweeted or referenced much in Twitter, do you count that as a signal outside of finding any non-nofollowed links that may naturally result from it?Google: Yes, we do use it as a signal. It is used as a signal in our organic and news rankings. We also use it to enhance our news universal by marking how many people shared an article searchengineland.com/what-social-signals-do-google-bing-really-count-55389
What Might Be in a Tweet Algo? Number of Unique Tweeting Sources (Diversity)
 “Author Authority” of the Tweeting Sources
 Time of Tweet (QDF)
 Connection Between Tweeter and Source Domain
 Quantity + Quality of Retweets
 Quantity of Clickswww.seomoz.org/blog/google-bing-confirm-twitter-facebook-influence-seo
#2: Data Suggests Some Other Influences on Rankings, Too
Social Sources, Mentions + More
#3: Google’s Betting Heavily on Local, but Rankings are Less of a Mystery
Increased Prominence of “Places”searchengineland.com/google-local-business-center-becomes-google-places-40307
Algo Heavy on Listing Quantity + Consistencywww.seomoz.org/blog/google-places-seo-lessons-learned-from-rank-correlation-data
#4: 2010 Still Wasn’t the “Year of Mobile” + Mobile SEO is Becoming Less “Unique”
Mobile SEO Very Similar to Web SEO
#5: Link Spam Still Works(But for How Long?)
How Can We Stop Buying Links When It Works?!searchengineland.com/key-takeaways-from-googles-matt-cutts-talk-at-pubcon-55457
#6: Topic Modeling Likely Has a Substantive Impact on Rankings
Simplistic LDA Models Offer Higher Ranking Correlation than Any Other On-Page Metricwww.seomoz.org/blog/content-optimization-revisiting-topic-modeling-lda-our-labs-tool
#7: No One’s Taking Market Share from Google (Yet)
Search Volume Growth Over Time
#8: Google + Bing Have Similar Ranking Influences
Google vs. Bing Ranking Correlationswww.seomoz.org/blog/google-vs-bing-correlation-analysis-of-ranking-elements
#9: Video, News, Blogs, Images, Social are All Providing Opportunity(and adding complexity)

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