Every media buyer has generated an ad set that technically ships and immediately reads as machine-written. The tell isn't the words it's the rhythm.
What gives it away
Three-part sentences. Balanced clauses. A little too much parallelism. "Discover the power. Unlock the possibilities. Transform your business." Nobody talks like that. Nobody scrolls past that.
The three fixes
- Break rhythm on purpose. One sentence should be too short. One should be almost too long. Vary the way a person writes when they actually mean it.
- Use one specific noun the model wouldn't guess. Not "customers" "the guy at the front desk of a boutique hotel in Lisbon." The specificity is the anti-tell.
- Cut every gerund you can. "Helping you achieve" → "so you achieve." "Enabling growth" → "you grow." Gerunds are the fingerprint.
The one-line prompt add
Paste this before any ad copy generation: "Break rhythm. Vary sentence length. Cut every gerund. Include one concrete noun a chatbot wouldn't guess."
The measurable effect
Ad sets rewritten with these three constraints have higher CTR and lower CPA in every test I've run this year. The audience doesn't consciously know why the copy feels different. They just stop scrolling.
Draft yours with the Meta Ads Copy tool.