The document discusses techniques for pretesting advertisements, including concept testing and copy testing. Concept testing uses qualitative methods like focus groups to explore potential ad concepts early in the creative process. Copy testing uses quantitative methods like memory tests to evaluate final ad executions and select the best one. The appropriate technique depends on factors like whether the ad has an informational or emotional appeal and how close the pretest stimulus is to the final ad. Off-air testing of finished ads can reliably predict effectiveness according to research.