A method of testing which aims to determine the ‘best’ of two aspects. For example, it is common to split test two landing pages for a given PPC campaign to see which of the two converts better. Alternatively you could split test two ads to see which performs better.A method of testing which aims to determine the ‘best’ of two aspects. For example, it is common to split test two landing pages for a given PPC campaign to see which of the two converts better. Alternatively you could split test two ads to see which performs better.