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Online Advertising

Ad copy that earns the click

Thirty characters a headline, ninety a description. Inside that frame it is decided whether your budget works or is merely spent.

Jul 16, 2026 2 min read 423 words
Ad copy that earns the click

Key points

  • The query belongs verbatim in the first headline.
  • One concrete number beats any adjective.
  • Fifteen headlines are compulsory so the system has something to combine.

Ad copy is the only part of your advertising a searcher sees before the click. It has two jobs that pull against each other: attract as many suitable people as possible and deter as many unsuitable ones as possible.

The anatomy of a responsive search ad

You supply up to fifteen headlines of thirty characters and up to four descriptions of ninety. The system assembles three headlines and two descriptions and keeps testing.

That means every headline has to stand alone and combine with every other. Writing "Call now and" and "save 20 per cent" as two headlines guarantees nonsensical combinations.

Fifteen headlines by job

CountJobExample
3query verbatimBathroom refits done properly
3differentiatorFixed price, 14-day build
2trustMaster trade since 1994
2call to actionBook a free survey
2objectionRented flats welcome
2area or audienceServing Leeds and district
1urgency, if realSlots from August

That spread gives the system material for every situation and prevents fifteen variations of one sentence.

Why numbers work and adjectives do not

"High-quality bathroom refit" asserts what everyone asserts. "Bathroom refit in 14 days" is checkable and therefore credible. Numbers work for three reasons: they are short, they stand out typographically, and they force the sender to commit.

Every business has usable numbers: years trading, projects completed, response time, lead time, build time, guarantee period, number of locations, team size, review average and count.

Replace every adjective you cannot prove with a number you can. If you cannot find one, you are missing an argument, not a phrase.

What reliably fails

Exclamation marks in every headline, which read as shouting and are sometimes rejected. The company name in several headlines, outside brand campaigns. Superlatives without proof, which carry legal risk. Questions as headlines, which rarely earn more clicks and often worse ones. Identical copy across all ad groups, which costs relevance directly.

The description is the filter

While the headline attracts, the description sorts. This is where anything that should deter an unsuitable click belongs: minimum job value, service area, audience. A click that does not happen is money in the bank.

An example: "We refit bathrooms from £15,000 within 40 km of Manchester. Fixed price after survey." That sentence costs clicks and earns money.

Testing with meaning

Never change more than one thing at a time, and give each ad at least 100 clicks before judging. The built-in rating by click-through rate is a hint, not a verdict: an ad with a high click rate and a poor conversion rate has cost money, not made it.

Judge on the level you pay for: cost per enquiry, not click-through rate.

Frequently asked questions

How many ads per ad group?

Two responsive search ads is the optimum. At three or more the data spreads so thin that no judgement is possible.

Should ads state prices?

If you are cheap in your market, absolutely. If you are not, a price filters out the wrong prospects and saves click costs.

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