Countless entities can damage your PPC campaign's performance ? from seasonal trends, to more competition, to implementation errors, and more. Here are some defensive strategies to help protect your hard work and preserve your positive progress.
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Source: http://feedproxy.google.com/~r/sewblog/~3/aSgW6Q0bVpc/PPC-Defense-Dont-Let-These-7-Factors-Damage-Your-Performance
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