“Every single element in an advertisement - headline, subhead, photo, and copy - must be put there not because it looks good, not because it sounds good, but because testing has shown that it works best!”
Quote by John Caples
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“If the headline is a good one, it is a relatively simple matter to write the copy.”
“Readers know what the copy is going to say.”
Source: Tested Advertising Methods: How to Profit by Removing Guesswork
Source: Tested Advertising Methods: How to Profit by Removing Guesswork
