Copywriting That ConvertsWriting landing pages and ads · Lesson 11 of 19

Search ad copy: intent, relevance and constraints

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Search ad copy: intent, relevance and constraints

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Chapter 1 of 12

Search ad copy: intent, relevance, constraints

  • The customer asks first
  • Responsive search ads
  • Building a headline mix
  • Copy in the age of AI Max

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Search ads answer a question

Someone typing into a search engine has told you what they want. Search ad copy should reflect that intent and show why your result is the best click. Unlike social ads, you are not interrupting — you are responding.

Responsive search ads (RSAs)

On Google Ads, the standard text ad format is the responsive search ad. You provide up to 15 headlines (30 characters each) and up to 4 descriptions (90 characters each), and the system tests combinations, showing up to three headlines and two descriptions at a time. Microsoft Advertising uses a similar format. Check current specifications before writing, as platforms update them.

Implications for copywriters:

  • Each headline must make sense on its own and in any combination.
  • Avoid repeating the same idea across many headlines — variety helps the system find good combinations.
  • Pinning (fixing a headline to a position) gives control, for example for legal disclaimers or brand names, but reduces combinations — use sparingly.

A headline mix for an RSA

RoleExamples (for an online accounting course)
Keyword relevanceOnline Accounting Course
OutcomeGet Job-Ready in 12 Weeks
DifferentiatorLive Classes, Real Case Studies
Proof4.8/5 From Verified Learners (only if true)
OfferFree Trial Lesson Available
AudienceFor Career Changers & Graduates
CTABook Your Free Trial Today
ObjectionEvening & Weekend Batches

Descriptions expand the promise:

"Learn accounting with live classes and real business case studies. Evening batches available."
"Practical skills employers ask for. Book a free trial lesson and meet your tutor first."

Message match and ad-to-page continuity

Search ads should lead to a page that continues the promise. If a headline says "Evening & Weekend Batches", the landing page should show the schedule prominently. Relevance between keyword, ad and landing page also influences ad quality assessments on search platforms.

Using assets (extensions)

Search platforms let you add assets such as sitelinks, callouts, structured snippets, prices and images. Copy tips:

  • Sitelinks: route intent — "Course Schedule", "Fees & Instalments", "Student Reviews".
  • Callouts: short proof points — "Certified Tutors", "Instalment Plans", "Career Support".
  • Structured snippets: lists under a header, for example Courses: Bookkeeping, Payroll, Tax Basics.

Assets increase the space your ad occupies and answer questions before the click.

Policy essentials

Search platforms enforce editorial and content policies. Common issues:

  • Excessive capitalisation or punctuation ("FREE!!!").
  • Unverifiable superlatives ("Best in the world") — may require substantiation.
  • Trademarks — restrictions vary; do not use competitor trademarks in ad text without understanding the rules.
  • Restricted categories (financial services, healthcare, gambling, alcohol) that require certification or have country-specific rules.

Worked example: an emergency plumber

Searchers typing "emergency plumber near me" want speed and reliability.

Headlines:
- Emergency Plumber in Leeds
- 24/7 Call-Outs, Local Engineers
- Upfront Prices Before We Start
- Gas Safe Registered Engineers   (only if true)
- Call Now — Fast Response
Descriptions:
- "Local plumbers available 24/7 for leaks, burst pipes and blocked drains. Upfront pricing."
- "Call now to speak to a real person. We'll give you an arrival window before we set off."

The copy prioritises urgency, trust and price transparency — the concerns of an emergency searcher.

Search ads in the AI Max and Performance Max era

Google's automation increasingly writes and assembles search ads for you:

  • Responsive search ads (RSAs) accept up to 15 headlines (30 characters) and 4 descriptions (90 characters) and combine them automatically — check the current limits in Google Ads Help.
  • Automatically created assets and AI Max for Search campaigns can generate headlines and descriptions from your landing page and existing ads, and may adapt text to the query. Performance Max builds ads from your asset groups across Search, Shopping, YouTube, Display, Gmail, Maps and Discover.
  • Microsoft Advertising offers similar responsive and automatically generated formats.

What this means for the copywriter: your landing page copy becomes ad copy input, so vague or non-compliant page text can surface in ads. Supply strong, specific assets; review generated assets in the asset report; remove any that misstate prices, delivery or claims; and use brand guidelines or exclusions where the platform supports them.

Hands-on: build an RSA asset set in a spreadsheet (with a length checker)

Draft assets in a sheet so you can check lengths and coverage before uploading:

headlines = [
    "Emergency Plumber in Leeds",      # keyword/location
    "Arrive Within 60 Minutes",         # only if operations can guarantee it
    "No Call-Out Fee Before 8pm",       # offer (verify terms)
    "Gas Safe Registered Engineers",    # proof (must be true)
    "Fixed Price Quote by Phone",        # objection handling
    "Call Now - Open 24/7",             # CTA
]
descriptions = [
    "Burst pipe or no hot water? Local engineers on call 24/7. Upfront price before we start.",
    "Gas Safe registered. Card, Apple Pay or bank transfer. Book online or call in seconds.",
]
for h in headlines:
    assert len(h) <= 30, f"Headline too long ({len(h)}): {h}"
for d in descriptions:
    assert len(d) <= 90, f"Description too long ({len(d)}): {d}"
print(f"{len(headlines)} headlines, {len(descriptions)} descriptions OK")

Aim for variety across angles (keyword, benefit, offer, proof, objection, CTA) so the system has genuinely different combinations to try. Character limits count every character, including spaces.

Before and after

BeforeAfter
"Best Plumbers - Quality Service""Emergency Plumber in Leeds" + "Upfront Price Before We Start"
"Welcome to Our Website""Book a Boiler Service Online"
"Cheap Visa Services!!!""UK Visit Visa Application Help" + "Fixed Fee, No Hidden Charges" (only if accurate; avoid implying government affiliation)

Common mistakes

  • Generic headlines that could apply to any competitor.
  • Ignoring the searcher's intent (for example, selling features to someone searching for prices).
  • Ten near-identical headlines.
  • Promises the landing page does not deliver.
  • Policy violations delaying approval.

Keyword insertion and dynamic features

Search platforms offer features that insert the user's search term or location into ads automatically. They can raise relevance but may produce awkward or even non-compliant text if keywords are broad or include competitor trademarks. Use them deliberately, with sensible default text, and review how the final ads read. Always check the ad preview for each major keyword group before launch.

RSA writing checklist

Key takeaways

  • Search ad copy responds to explicit intent — reflect it clearly.
  • Responsive search ads combine headlines (30 characters) and descriptions (90 characters); each must stand alone.
  • Use varied headline roles and assets to answer questions before the click.
  • Check editorial and restricted-category policies before launch.

Check your understanding

Quick questions to lock in the lesson. They don’t count towards your certificate.

  1. What is the character limit for a Google responsive search ad headline?
  2. Why must each RSA headline make sense on its own?
  3. Someone searches 'emergency plumber near me'. What should the ad prioritise?
  4. Your landing page says 'Delivery in 24 hours', but that is only true in two cities. Why is this now a bigger risk for search ads?

Put it into practice

Write a full responsive search ad (at least 10 headlines and 4 descriptions) plus four sitelinks for a service you know, and check each headline works alone.

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