This document discusses techniques for testing advertisements, including concept testing and copy testing. Concept testing uses qualitative methods like focus groups early in the creative process to explore advertising concepts. Copy testing uses quantitative methods like surveys later in the process to evaluate specific ad executions and make final decisions. Some common testing methods include focus groups, surveys measuring recall and persuasion, and pre-air tests of finished ads off-air for greater control. Both qualitative and quantitative methods each have strengths and weaknesses for different testing purposes.