How to Write Google Ads That Actually Convert

Why Your Google Ads Copy Matters More Than You Think

You could have the perfect keyword list, a generous budget, and laser-focused targeting — but if your ad copy is bland, none of it matters. Your ad is the first impression a potential customer gets of your business. In a search results page packed with competitors, the words you choose determine whether someone clicks your ad or scrolls past it.

The difference between a 2% click-through rate and a 5% click-through rate often comes down to how well your copy speaks to what the searcher actually wants.

Understanding Google Ads Character Limits

Before you start writing, you need to know the constraints you're working within. Responsive Search Ads (RSAs) are now the default ad format, and they give you more room than you might expect.

Element	Character Limit	How Many
Headlines	30 characters each	Up to 15
Descriptions	90 characters each	Up to 4
Display path	15 characters each	2 fields

Google will mix and match your headlines and descriptions to find the best-performing combinations. That means every headline needs to work alongside any other headline, and every description needs to stand on its own.

A Common Mistake With RSAs

Many advertisers write 15 headlines that all say roughly the same thing. Google needs variety to test properly. Aim for headlines that cover different angles — your USP, a call to action, social proof, location, and the core benefit.

Writing Headlines That Demand Attention

You have 30 characters to make an impact. Every word has to earn its place. Here are the approaches that consistently perform well for UK businesses.

Lead With the Benefit, Not the Feature

Instead of "We Offer 24/7 Support," try "Get Help Whenever You Need It." The first tells them what you do. The second tells them what they get.

Include Your Location

For local businesses, mentioning your area builds immediate relevance. "Trusted Plumber in Manchester" or "London's Top-Rated Cleaners" tells the searcher you're nearby and relevant to them.

Use Numbers and Specifics

Vague claims get ignored. Specific numbers build credibility.

"Save Up to 30% on Energy Bills" outperforms "Save Money on Energy"
"Rated 4.9/5 by 500+ Customers" outperforms "Highly Rated Service"
"Free Quote in 60 Seconds" outperforms "Get a Free Quote"

Add Urgency (Without Being Pushy)

Phrases like "Limited Availability," "Book This Week," or "Offer Ends Friday" can lift click-through rates — but only use them if they're genuine. False urgency erodes trust fast.

Writing Descriptions That Close the Deal

Your descriptions have 90 characters each, giving you space to expand on the promise your headline made. Think of descriptions as your chance to answer the searcher's silent objection: "Why should I pick you?"

Structure Your Descriptions Like This

Reinforce the benefit — Echo the headline's promise with more detail
Add a trust signal — Mention experience, reviews, accreditations, or guarantees
Include a clear CTA — Tell them exactly what to do next

Example:

"Family-run business with 15 years' experience across Greater London. Book your free, no-obligation quote online today."

Power Words That Work in Google Ads

Certain words consistently improve performance in ad copy. Use them naturally — never force them in.

Category	Words
Trust	Free, guaranteed, no-obligation, certified, accredited
Urgency	Today, now, limited, this week, hurry
Value	Save, affordable, best value, compare, exclusive
Ease	Simple, easy, quick, hassle-free, straightforward

Emotional Triggers That Drive Clicks

People don't buy services — they buy solutions to problems that are causing them stress. The best Google Ads copy taps into the emotion behind the search.

Pain Points

If someone searches "emergency boiler repair," they're cold and stressed. Understanding what your customers are searching for helps you write better ads. Your ad should acknowledge that: "Boiler Broken? Same-Day Repair Across Birmingham."

Aspiration

A search for "garden landscaping ideas" comes from someone imagining their dream outdoor space. Speak to that vision: "Transform Your Garden Into Something Special."

Fear of Missing Out

For competitive services, highlighting demand can work well: "Only 3 Slots Left This Month" or "Manchester's Most In-Demand Accountant."

Highlighting Your Unique Selling Proposition

Your USP is what separates you from the other three or four ads on the page. If you can't answer "why should someone pick us over the competition?" in one sentence, your ads will struggle.

Common USPs for UK service businesses include:

Speed: "Same-day service" or "Response within 1 hour"
Experience: "20 years serving West Yorkshire"
Price: "No call-out fee" or "Price-match guarantee"
Quality: "Which? Trusted Trader" or "Checkatrade verified"
Convenience: "Online booking in 30 seconds" or "Evening & weekend appointments"

Pick your strongest USP and make it the star of at least two or three headlines.

Calls to Action That Actually Work

A weak CTA like "Learn More" or "Click Here" wastes valuable characters. Strong CTAs tell the searcher exactly what happens next and what they'll get.

High-Performing CTAs for UK Businesses

"Get Your Free Quote Today"
"Book Your Free Consultation"
"Call Now for Same-Day Service"
"Compare Prices in 60 Seconds"
"Claim Your Free Audit"

Notice the pattern: each one is specific, action-oriented, and tells the user what they'll receive.

Testing and Improving Your Ads

Writing great ads isn't a one-and-done job. The best accounts continuously test new copy and refine what's working.

What to Test

Headlines: Try different USPs, CTAs, and emotional angles
Descriptions: Test longer benefit-focused descriptions against shorter, punchier ones
Display paths: Use these to reinforce keywords (e.g., /free-quote or /manchester)

How to Measure Success

Look at these metrics to judge your ad copy:

Metric	What It Tells You
Click-through rate (CTR)	How compelling your ad is
Conversion rate	How well your ad attracts the right people
Cost per conversion	Whether your clicks are worth the spend

A high CTR with a low conversion rate often means your ad is promising something your landing page doesn't deliver. Make sure the two are aligned — see our landing page checklist for what to get right.

Quick Checklist Before You Publish

Before you set your ads live, run through this:

Does every headline work with any other headline?
Have you included your core USP in at least two headlines?
Is there a clear CTA in at least one headline and one description?
Have you mentioned your location (if you're a local business)?
Are you using specific numbers rather than vague claims?
Does your ad copy match your landing page?

Get Expert Eyes on Your Ads

Writing high-performing Google Ads copy takes practice, testing, and a solid understanding of what your customers actually care about. If you'd like a professional review of your current ads — including specific recommendations for improvement — request your free SwiftLead audit. We'll analyse your ad copy, keywords, and landing pages, then show you exactly where the opportunities are.

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