How to Write Ad Scripts That Actually Perform

The best ad scripts don't read like scripts. They read like someone talking to someone else about something they genuinely find interesting. The gap between how most scripts are written and how the best scripts work is the gap between writing and speaking.

Write for the ear, not the page

A sentence that reads well often sounds stiff when spoken aloud. Complex sentences. Subordinate clauses. Vocabulary that nobody uses in conversation. These are writing instincts, not speaking instincts.

Before you finalize any script, read it out loud. Not in your head — out loud, to another person or to your phone's voice memo. The places where you stumble, speed up unnaturally, or sound like you're reading a prepared statement are the places the script needs to change.

The spoken version should feel slightly too casual for the page. Contractions. Sentence fragments. The kind of half-sentences people actually use. "Here's the thing" is better than "The important consideration is." Not because it's shorter — because it sounds like a person said it.

One idea per script

The most common script failure: trying to say too much. The script opens with a hook, introduces the problem, explains the solution, lists three features, includes a testimonial, mentions the pricing, and ends with a CTA. By the time the CTA arrives, the viewer has forgotten the hook.

A video ad has room for approximately one idea. Not one product. One idea. "This product solves this specific problem in this specific way." Everything in the script serves that idea or gets cut.

If you have three features you need to communicate, that's three ads. Not one ad with three features. The brain can process one clear message. It cannot process three messages in 30 seconds, no matter how well the script is written.

The first sentence earns the second

Don't use the first sentence to set context. Don't use it to introduce the brand. Don't use it to say hello. Use it to make the viewer curious enough to hear the second sentence.

The best first sentences have a specific quality: they make the viewer ask a question that the second sentence answers. Not a vague question like "what is this about?" but a specific question like "what data?" or "which three patterns?" or "how much did it change?"

If your first sentence doesn't create a specific question in the viewer's mind, rewrite it. The second sentence is free — the viewer will hear it because they want the answer. But you have to earn it with the first.

Cut the throat-clearing

Most scripts have a throat-clearing phase: the first 20% of the script that sets up what the ad is going to be about before it actually gets to the point. "In today's competitive landscape, marketers are increasingly finding that..." is throat-clearing. "Your ads are underperforming because you're testing wrong" is not.

Throat-clearing exists because writers need to warm up. The fix is simple: write the script. Then delete the first two sentences. Start at sentence three. In most scripts, that's where the ad actually begins.

The CTA should feel inevitable

If the ad has done its job, the CTA isn't a request — it's the natural next step. The viewer already wants to know more, try the product, or solve the problem. The CTA just tells them how.

Bad CTAs ask the viewer to do something they haven't been convinced to want. They feel like a non-sequitur. The ad was about a problem, and suddenly the brand is asking for a click. The transition is jarring because the ad didn't build enough motivation.

Good CTAs feel like the logical conclusion of the ad that preceded them. They match the motivation level the ad created. If the ad built mild curiosity, the CTA should be low-commitment: "See how it works." If the ad built strong motivation, the CTA can be more direct.

Script length rules

At normal speaking pace, a person speaks roughly 2.5 to 3 words per second. So:

A 15-second ad has room for roughly 38-45 words
A 30-second ad: 75-90 words
A 60-second ad: 150-180 words

Most scripts are overwritten by 20-30% relative to these numbers. The writer fills the time with words, leaving no room for visual beats, pauses, or the viewer to process what was said. A script that reads at 90 words in 30 seconds when read silently becomes 110 words when spoken at natural pace — and the CTA gets cut off.

Write the script, time it by reading it aloud at a natural pace, then cut 20% of the words. You'll land at the right length with room for the visuals to breathe.