Ad extensions (officially renamed ad assets by Google in 2022) are supplemental elements that expand your search ad with additional information like phone numbers, sitelinks, locations, prices, and callouts. They make your ad physically larger on the SERP, push competitors lower, and lift CTR by 10-15% on average — free to add, with normal CPC only when clicked.
Extensions turn a good ad into a great one. They give searchers more reasons to click and more paths to convert — without costing you extra. Not using them is like renting a billboard and only filling half of it.
What are ad extensions?
Ad extensions — officially renamed assets by Google in 2022 — are supplemental elements that expand your search ads with extra information such as phone numbers, additional links, addresses, prices, and structured snippets.
They make your ad physically larger on the search results page, pushing competitors lower and grabbing more visual attention. Google reports extensions lift CTR by 10-15% on average. They're free to add — you only pay when someone clicks — and Google factors extension usage into Quality Score calculations, so ads with active extensions often pay less per click than ads without them.
Google renamed ad extensions to ad assets in 2022 to unify vocabulary across Search, Display, YouTube, and Performance Max. The mechanic is identical — you're still adding sitelinks, callouts, and call buttons. Most advertisers use both terms interchangeably.
Why ad extensions matter
Extensions give searchers more reasons to click and more paths to conversion, all without costing you extra impressions. Four reasons every PPC manager prioritizes them:
- Bigger ad footprint. More screen real estate means higher visibility and fewer clicks going to competitors below the fold.
- Higher CTR. Google's own data shows 10-15% CTR improvements when extensions are active — sometimes more for local intent queries.
- Better Quality Score. Google uses expected CTR (influenced by extensions) as a Quality Score factor, which lowers your CPC.
- More conversion paths. A phone number extension lets mobile users call directly. A sitelink sends them to a specific product page. Each extension is a new way to convert without an extra click on your main URL.
How ad extensions work
You set up the extensions at the account, campaign, or ad group level. Google decides which ones to show based on context, device, ad position, and predicted performance. You provide the options; Google picks the combinations.
Types of ad extensions
| Extension | What it shows | Best for |
|---|---|---|
| Sitelink | Extra links below the ad (e.g. Pricing, Reviews, Contact) | Every campaign — highest CTR lift |
| Callout | Short text snippets (25 char max) — "Free Shipping", "24/7 Support" | Reinforcing selling points |
| Call | Click-to-call phone number on mobile | Service businesses, lead gen |
| Location | Address + map pin, pulled from Google Business Profile | Local businesses, retail |
| Structured snippet | Category lists — "Services: SEO, Content, PPC" | Multi-service brands |
| Price | Specific products or tiers with pricing | Ecommerce, SaaS pricing pages |
| Lead form | In-SERP form capture | B2B lead gen, high-intent |
| Image | Product/service imagery next to the ad | Visual products, retail |
Sitelink extensions
Add links to specific pages below your ad. A law firm might add sitelinks for "Personal Injury," "Car Accidents," "Free Consultation," and "Client Reviews." Each link sends users deeper into the site instead of just the main landing page.
Callout extensions
Short text snippets (25 characters max) that highlight selling points: "Free Shipping," "24/7 Support," "No Long-Term Contract." They don't link — they're purely informational — but they boost CTR by adding credibility signals.
Call and location extensions
Call extensions add your phone number with a click-to-call button on mobile. Location extensions show your address and a map pin — critical for local businesses. Both pull data from your Google Business Profile when the two accounts are linked.
Structured snippets and price extensions
Structured snippets list categories of services or products ("Services: SEO, Content Marketing, Link Building"). Price extensions show specific products with pricing. Both help qualify traffic — searchers who see your prices before clicking are more likely to convert on-page.
Real ad extension examples
Example 1 — Local dentist
A dental practice runs Google Ads with sitelinks (Teeth Whitening, Emergency Care, Insurance Accepted), a call extension, a location extension, and callouts ("Same-Day Appointments," "New Patient Special"). Their ad takes up 3x the vertical space of a competitor's basic text ad. CTR: 8.2% versus the industry average of 3.3%.
Example 2 — SaaS company
A B2B software company adds price extensions showing 3 pricing tiers, sitelinks to case studies and a free trial page, and callouts mentioning "30-Day Free Trial" and "No Credit Card Required." Extensions push their ad to the top of the SERP and their branded impression share doubles within a month.
Ad extensions vs. responsive search ad assets
Both are "assets" in Google's newer vocabulary — but they play different roles.
Use ad extensions when
- You want to expand the ad's footprint
- You have multiple destinations (sitelinks) or callouts
- Local intent — call and location matter
- You want to lift Quality Score cheaply
- You need lead-form or in-SERP conversion
Use RSA assets when
- You want Google to mix headlines and descriptions
- You're testing messaging combinations
- You want ML-driven creative rotation
- The core ad copy itself needs variety
- You're running Performance Max
7 best practices for ad extensions
- Add every relevant extension type. Google recommends at least 4 sitelinks, 4 callouts, and 2 structured snippets. More options = more display combinations.
- Match extensions to search intent. Branded queries get "Contact Support" sitelinks; commercial queries get "Pricing" and "Free Trial."
- Use ad-group-level extensions for granularity. Account-level is fine as a baseline, but ad-group-level overrides let you tailor sitelinks to specific keywords.
- Update seasonal extensions. "Free Shipping · Ends Sunday" performs better than evergreen callouts during promo periods.
- Link your Google Business Profile. Location and call extensions pull data from GBP — keep it accurate or your ads show wrong info.
- Enable lead-form extensions for high-intent B2B. In-SERP form capture cuts CAC by 20-30% on qualified queries in most tests.
- Monitor extension performance monthly. Google Ads reports CTR by extension. Kill underperformers and double down on the winners.
A "Free Trial" sitelink that lands on a generic homepage kills trust. Every sitelink must go to a page that fulfills the promise. Broken alignment tanks Quality Score and wastes clicks.
Common ad extension mistakes to avoid
- Duplicating headlines in sitelinks. "Buy Now" as a headline and "Buy Now" as a sitelink is a wasted slot.
- Ignoring mobile-only extensions. Call extensions are mobile-only by default — check your device targeting.
- Not updating disapproved extensions. A disapproved extension quietly drops. Check the Extensions tab weekly.
- Overusing generic callouts. "Award Winning" and "Trusted Brand" mean nothing. Specific claims ("Rated 4.9 · 12,000+ Reviews") always win.
- Forgetting structured snippets. Least-used extension type but delivers strong CTR lift on category-heavy searches.
Frequently asked questions
Adding them is free. You pay the normal CPC when someone clicks on an extension element like a sitelink or call button. Callouts and structured snippets don't have separate click costs because they don't link anywhere.
As many relevant ones as possible. Google recommends at least 4 sitelinks, 4 callouts, and 2 structured snippets. The more options Google has, the more likely it is to display extensions with your ad.
No. Google shows extensions only when it predicts they'll improve ad performance based on context, device, ad position, and other signals. Your ad generally needs to be in the top positions for extensions to appear.
Google renamed them in 2022 to unify vocabulary across Search, Display, YouTube, and Performance Max. The mechanic is the same — supplemental elements that expand the ad — but 'asset' better fits campaigns where ad copy is machine-assembled.
Indirectly, yes. Extensions raise expected CTR, and expected CTR is one of the three Quality Score components. Ads with active extensions typically pay less per click than ads without them.
Related glossary terms
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