What is ad copy? Advertising text that generates leads

Ad copy is the text in your ad: the headlines, the descriptions and the call to action that have to convince someone to click and then submit a request. It is the part of your Google Ads campaign that lets a searcher understand, in just a few words, why you are the answer to their query. Good ad copy does not just attract clicks, it attracts the right clicks. In this article you will learn what ad copy is exactly, how it works technically and what to steer on as a B2B advertiser.

What is ad copy exactly?

Ad copy is the written content of an advertisement. In search ads that consists of headlines, descriptions and the display URL. On social channels the primary text above the image is added to that. The goal is always the same: show relevance and prompt action.

In modern Google Ads you work with responsive search ads. There you supply multiple text elements that the system combines per search query. According to Google Ads Help you provide up to 15 headlines of up to 30 characters each and up to 4 descriptions of up to 90 characters each. You have to supply at least 3 headlines and 2 descriptions, but Google recommends giving as many variants as possible so the algorithm can test more combinations.

Important: ad copy is not the same as the text on your landing page. The ad brings in the click, the landing page turns it into a request. Both have to deliver on the same promise.

Which elements make up strong ad copy?

A convincing ad combines a few fixed building blocks. Below is what each element does, with an example and the mistake we see most often in practice.

The headline

The headline is the first thing a searcher reads and it weighs most heavily on your click-through rate. Include the keyword in at least one headline so the searcher recognises that they are in the right place. With responsive search ads the system mixes headlines together, so write every headline so that it works on its own. The common mistake: setting all headlines in the same tone (“Best agency”, “Top quality”), which leaves the system nothing to test.

The description

The description gives you the room to back up the promise in the headline: what you do exactly, for whom and why it holds up. Use those 90 characters for concrete substance, not for filler words. The mistake we often see is a description that repeats the headline literally instead of adding something to it.

The value proposition (USP)

What makes you different? Speed, specialisation, a guarantee or a concrete result. A strong value proposition makes a choice: naming the niche is sharper than trying to appeal to everyone. The classic miss is “quality and service”, a claim every competitor makes too and that therefore sets nothing apart.

The call to action (CTA)

Request a quote, book a demo, schedule an intake. A concrete CTA tells the searcher exactly which step follows. Vague (“more info”, “click here”) converts worse because it sets no expectation. In B2B, a CTA that names the level of commitment (“free intake”, “no-obligation conversation”) often works better than a hard sales pitch.

It pays to test variants with different angles: one headline on price, one on results, one on removing risk. That way the system learns which message lands with which searcher.

Weak versus strong ad copy

The difference between ad copy that burns budget and ad copy that generates leads often comes down to the same four elements. This comparison makes it concrete:

Ad copy for B2B: qualifying instead of luring

For a webshop, ad copy is often about maximum traffic at low cost. For B2B it is different. Your audience is narrow, your sales cycle is long and one wrong lead costs you selling time. That is why you write ad copy that filters just as well as it lures.

You do that by being explicit. Name your niche (“for manufacturers”, “B2B only”), the problem you solve and the size of client you work with. A headline like “Free trial” attracts a lot of clicks, but a large share of them is not your audience. Bet on the right words instead and you pay less for clicks that do not matter. Good ad copy steers on the customer behind the click, not on the click itself.

A weak and a strong example side by side

Say you sell maintenance contracts for industrial machinery. A weak ad on the keyword “machine maintenance” looks like this: headline “Need machine maintenance? We can help”, description “Skilled professionals with years of experience. Get in touch today.” That gets clicks, but it just as easily attracts private individuals, small workshops and people looking to do a repair themselves.

The strong variant qualifies right in the text: headline “Maintenance contract industrial machines”, second headline “For manufacturers only”, description “Fixed point of contact, scheduled service visits and 24h response for production lines. Request a tailored quote.” That same ad attracts fewer clicks, but the clicks that do come in are closer to a real assignment. That is precisely the goal: not more traffic, but better traffic.

How do you measure whether your ad copy works?

You measure ad copy on two levels. The click-through rate (CTR) tells you whether your message lands in the search results: do people look and do they click? That is a useful first signal and it also feeds your Quality Score, because Google rewards ads that are relevant with a lower cost per click. You can read more about how that click-through rate counts in our explanation of CTR.

But CTR alone is misleading. In practice we see campaigns with a fine click-through rate that still barely produce leads, because the text attracts the wrong people. That is why we steer on what comes next: the conversion rate (how many clicks become a request) and above all the quality of those requests. A headline that raises your CTR by a third but halves your share of qualified leads costs you money instead of earning it. When we tuned a client’s ad texts more tightly to their audience, the wasted click budget visibly dropped, something you also see in cases like Facilicom’s media savings through a better Quality Score.

How do you write ad copy that converts?

Start with the search intent, not with your own offering. What does someone type in and which problem sits behind it? Align your headlines with that. Then use a clear structure and test consistently.

If you want to go deeper on the writing side, read how to apply conversion copywriting to your ads and landing pages. And because writing dozens of variants takes time, it can help to know how to use AI for Google Ads ad copy without losing sharpness. Ad copy is part of broader PPC and SEA, so always align your texts with your bidding strategy and your landing page.

Frequently asked questions

What is the difference between ad copy and content? Ad copy is short, action-oriented text that has to lead to a click or a request, usually within tight character limits. Content (such as blog articles) informs more broadly and serves to build trust and authority over a longer period.

How many headlines should I supply in Google Ads? For a responsive search ad you can supply up to 15 headlines and 4 descriptions. The minimum is 3 headlines and 2 descriptions, but more variants give the algorithm more room to optimise.

What should I measure to know whether my ad copy works? Do not just look at the click-through rate (CTR), but at the number of qualified requests and the eventual revenue. A high CTR with poor leads means you are paying for the wrong visitors.

Does my ad copy have to match my landing page? Yes. If your ad promises something the landing page does not immediately deliver, visitors drop off and your Quality Score falls. The same message and tone across both increase your chance of conversion.

Want to write better ads yourself?

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