In digital environments, it’s fairly simple to gauge customer attitudes—at least in part—based on the behavior of those customers. If they come back to the website over and over, they are very satisfied with what they find there, they are gluttons for punishment, or they are your Mom.
Email provides its own built-in success metrics in the form of open rates, click-through rates, unsubscribe rates, and the rest.
Online forms have conversion rates to infer similar achievements.
http://www.convinceandconvert.com/baer-facts/easy-feedback-mechanisms-are-key-to-customer-experience-optimization/
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