The short answer is yes A/B testing can hurt SEO rankings, but if you keep in mind and follow best practices below, you have nothing to worry about. Back in 2012, Google stated “…your tests having little or no impact on your site in search results.”
Depending on your strategy and where you are testing you may not even need to worry about these issues/recommendations. For example, much of the testing we perform is on PPC specific landing pages that serve a very specific goal – because of this we don’t even want those pages ranking or competing with the client’s corporate SEO efforts.
For the testing that we perform on our clients’ corporate sites, we are using a third party testing platform that significantly improves our testing efficiency and analysis capabilities. The platform also uses best practices for dealing with search engines so we do not have to manually set canonical urls, redirects etc. or worry about this every time we run tests.
When evaluating the testing methods / tools you want to use, make sure it is clear how this will be addressed. Will you manually have to include code to each test to ensure compliance? How does a potential third party tool run tests and address issues like cloaking?
My final thought – Don’t let SEO implications scare you away from testing! Testing is invaluable and an integral part of successful online marketing. With the proper knowledge you don’t have anything to worry about regarding SEO rankings.
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