Facebook's latest updates to its EdgeRank algorithm could have a big effect on social media marketers, James Thomas writes. People who play by the rules should be fine, but unethical marketers could find that shady tricks no longer give them or their clients much of an edge. "[T]he impact will be small to begin with, then all of a sudden the social hammer will drop and thousands of black hat practitioners will be out of a job," Thomas writes.

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