Rand Fishkin provides his take on how Facebook's Open Graph will impact Web marketing, as well as all the ways it won't. Fishkin says Facebook's "like" buttons don't affect search marketers today, but
that hasn't stopped many from becoming nervous about how it could influence their future. Fishkin tries to answer questions around link signals by answering questions on how the change could
influence SEO on the Web. He starts by explaining the difference between link graphs and social graphs.
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