What is Test And Learn?

Legal Definition
Test and Learn is a set of practices followed by retailers, banks and other consumer-focused companies to test ideas in a small number of locations or customers to predict impact. The process is often designed to answer three questions about any tested program before rollout:

  1. What impact will the program have on key performance indicators if executed across the network or customer base?
  2. Will the program have a larger impact on some stores/customers than others?
  3. Which components of the idea are actually working?
-- Wikipedia