An ad headline is the large, linked line of text at the top of a Google search ad. It is the most visible part of the ad and, for most searchers, the only part they read before deciding whether to click or keep scrolling.
How ad headlines work
In a responsive search ad, you write between three and fifteen headlines, each up to 30 characters. Google shows up to three at a time, joined by separators, and tries different combinations to learn which ones suit each search. On mobile or in lower positions, only two may show.
Because any headline can sit beside any other, each must read well in any order. A set of fifteen that all say a version of the same thing gives Google little to work with, and the Ad Strength rating will usually flag it. You can fix a headline in position one, two or three using pinning, which is useful for a brand name or a required disclaimer but narrows the combinations.
Headlines can include keyword insertion, which swaps in the matched keyword, and countdown or location customisers. These help relevance but can produce awkward text if the keyword list is messy.
Why it matters
The headline is where a searcher checks whether your ad matches what they typed. Someone searching “Saturday MOT Reading” wants to see those words or their meaning straight away. A headline that repeats the need back to them, then adds a reason to choose you, earns more clicks. That higher click-through rate feeds Google’s view of expected CTR, and a headline that reflects the search supports ad relevance; both affect how much you pay.
Headlines also set expectations. Including a price in pounds, a service area or a qualifier such as “For Landlords” sends the wrong people elsewhere before they cost you a click. For a UK service business paying several pounds per click on competitive terms, that filtering is often worth more than a small rise in click volume.
Common mistakes
- Writing only the minimum three headlines, so Google has nothing to test.
- Fifteen near-duplicates with the same keyword in each.
- Pinning every headline, which turns a responsive ad into a fixed one and usually lowers Ad Strength.
- Generic slogans (“Quality You Can Trust”) that any business could use.
- Claims you cannot back up, such as “UK’s Number One”, which can breach the CAP Code as well as Google’s policies.
- Excessive capitals or punctuation, which Google’s editorial policy disallows.
How to act on it
Write at least ten headlines per ad, in several groups: three or four that contain the main keyword or its close variants, three or four that give specific benefits or proof, two or three that remove doubts (price, location, speed) and one or two calls to action. Pin only what genuinely needs a fixed place.
For a mobile tyre fitter in Nottingham, a balanced set might include “Mobile Tyre Fitting Nottingham”, “We Come to Your Home or Work”, “Same-Day Slots Most Weekdays”, “Budget and Premium Brands”, “Prices Shown Before You Book” and “Book Your Fitting Online”. None depends on another, and any three together still make sense. Read the ad preview on a phone too, where space is tighter.
After a few weeks, check the asset details to see which headlines rarely show and replace them with new angles. Headline writing and testing sit at the centre of how I build Google search ads, because small wording changes here often matter more than bid changes.