SEO and web marketing

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http://blog.majesticseo.com/research/googles-strongest-current-backlinks/

Google’s Strongest Current Backlinks | Majestic SEO Blog

Some interesting obsevations about the top 50,000 links to Google are: Some of the anchor text is listed with ??
http://analytics.blogspot.com/

Google Analytics Blog

Measuring the value of social media has been a challenge for marketers. And with good reason: it’s hard to understand exactly what is happening in an environment where activity occurs both on and off your website. Since social media is often an upper funnel player in a shopper’s journey, it's not always easy to determine which social channels actually drive value for your business and which tactics are most effective.