The conversation between human and AI assistant.
[|Human|] What principles does conversion rate optimization share with direct response marketing?
[|AI|] They are both marketing approaches that emphasize tracking, testing, and on-going improvement. Direct response marketers also practice A/B split-testing, response tracking, and audience testing to optimize mail, radio, and print campaigns.
[|Human|] 
What principles does conversion rate optimization share with direct response marketing?