What is Multilevel Split Testing?
Multilevel Split Testing or A/B/C+ split testing is almost exactly the same thing as traditional A/B split testing, except that there are multiple (more than 2) pages being tested at the same time.
As in the case with traditional A/B split testing, it is always best to test single elements (i.e. the headline, price etc) between all versions.
Additionally Multilevel Split Testing should only be used on pages with a high traffic volume, as this will enable an adequate sample size within a short period of time in order to establish a credible result.
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