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  ## Introduction

The  [amp-experiment](https://www.ampproject.org/docs/reference/components/amp-experiment) component allows to perform user experience experiments on an AMP document and collect resulting data. This is, for example, good for A/B testing new features in your AMPs, but you can test as many variants as you want.

In this sample, we're using Google Analytics to track the experiment. Google Analytics requires different variants to be specified via an index variable. However, `amp-experime