Latest / The Copywriting Podcast with Fexingo: Sales Letters, Headlines, and Persuasive Writing
How a Single Comma Added 1.2 Million Dollars in Sales
Lucas and Luna break down the famous test where a direct mail copywriter added a single comma inside a headline and saw a 42% lift in response. They trace the mechanics: how a comma changes the reader's internal voice, pacing, and perceived authority. They dig into two other comma-driven tests from mail-order insurance and a B2B SaaS landing page, showing how the smallest punctuation mark can be the difference between a skim and a read. Lucas argues that the comma is an underused persuasion tool — not grammar, but rhythm — and Luna pushes back on whether it scales in digital. The episode…
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