incrementality
Noun
Meaning
The property or characteristic of being incremental.
The amount of change caused by a small increment of input.
Source: en.wiktionary.orgExamples
Let’s say we run our test and get a 20% incrementality, this means we received 20% more conversions because we showed an ad.
The number one question advertisers are asking now is, “How can I measure incrementality?”
While enterprise marketers are hard at work building advanced media models to measure their incrementality, inaccurate baseline data dooms these efforts to failure before they even start.