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Google has lots of useful tools to offer to the marketer – most of them are free and awesome – the two words you not so often find go in combination.
Keyword Research with Google Only: No Other Tools Needed | Searc
As SEOs, we are interested in the most influential factors in commercial web search results. Accordingly, we have been conducting ongoing studies looking at the relationship between web search results and link metrics/anchor text from Linkscape, social media signals from Facebook and Twitter, and on-page/URL/domain keyword factors. This document explains our methods, including the construction of the data set and statistical analysis.

