Content Marketing Glossary

  • What is Ad Copy?

What is Ad Copy?

Ad Copy

Ad copy is the text inside a paid ad - the headline, the description, the call to action - that has to do its entire job in roughly the same number of characters as a tweet.

It’s the most expensive writing on the internet. Bad ad copy doesn’t fail quietly the way a bad blog post does - it shows up as a brutal CPC and a CMO asking why the budget is on fire.

What separates ad copy from regular copy

Three constraints make ad copy its own discipline:

Character limits. Google Search ads cap at 30 characters per headline and 90 per description. Meta gives you 40 characters before truncation on most placements. LinkedIn’s headlines are 70 max. You learn to write in fragments because complete sentences won’t fit.

One job, one beat. A blog post can earn its way over 1,500 words. An ad has to land a single specific promise in the first three seconds before the thumb keeps scrolling. Pick one benefit. Cut everything else.

Match between ad and landing page. The ad sells the click. The landing page sells the action. If the ad promises “30-minute setup” and the page opens with “comprehensive enterprise platform,” you’ve taught the visitor you bait-and-switch. Bounce.

The structure that works on most platforms

Almost every winning ad fits the same shape:

Specific outcome up front. “Cut reporting time from 4 hours to 12 minutes.” Not “improve your workflow.” Numbers beat abstractions.

One line of proof. “Used by 800 RevOps teams at companies like Stripe.” Something that makes the claim believable.

A direct call to action. Not “Learn more” - that phrase is where ad spend goes to die. Name the actual next step: “See the 90-second demo.” “Get the free template.” See call to action for the longer version.

The thing most ad copy gets wrong

Writing it for the brand instead of the buyer.

“We’re the leading platform for ___” is a sentence about you. The buyer doesn’t care. Reverse it: name their situation, name what they’re trying to do, name the outcome they want. “We” should appear roughly never. “You” - or the implied you - should be in almost every line.

This is the single most common rewrite I do on ad copy and it lifts click-through rate almost every time.

An example

A B2B SaaS sells project management software for construction firms. Their original Google ad: “Project Management Software | Manage Your Projects Better | Free Trial.”

Could swap with any competitor’s. CTR sat at 1.8%, CPC at $14.20.

The rewrite: Headline 1 - “Track 12 Job Sites in One Tool.” Headline 2 - “Built for Construction PMs, Not Devs.” Description - “Punch lists, daily logs, and RFIs in one place. Used by 400+ contractors. See the 5-minute demo.”

Three weeks later: CTR 4.6%, CPC $5.80. Same product, same landing page, same audience. The copy did the entire lift because it named the buyer’s actual job instead of describing the category.

Test, don’t argue

Ad copy is one of the few places where opinion settles fast. Run a few hundred dollars through two variants and read the numbers a week later. A/B testing ad copy is cheap, fast, and usually decisive - the discipline rewards people who let the data pick instead of falling in love with the line they wrote in the shower.

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