What Is an Ad Extension?
An ad extension is a feature within Google Ads (and, in various forms, Microsoft Ads) that allows you to attach supplementary information to your standard search ad. Google now refers to most extensions as "assets", but the term ad extension remains widely used. Extensions do not replace your headline and description text. Instead, they appear below or alongside your main ad copy, providing additional context that can encourage a user to click or interact with your ad in a specific way.
There are many types of ad extensions, each serving a distinct purpose. Sitelink extensions allow you to add extra links beneath your ad, directing users to specific pages on your website such as a contact page, services page, or current offer. Callout extensions are short phrases (up to 25 characters) that highlight key selling points, such as "Free consultation", "Google certified", or "No long-term contracts". Call extensions display your phone number directly in the ad, allowing mobile users to call with a single tap. Location extensions pull your business address from Google Business Profile and display it under the ad, helping local businesses in Pretoria, Cape Town, and Johannesburg appear more credible and relevant to nearby searchers.
Other useful extensions include price extensions, which display your service tiers and starting prices; structured snippet extensions, which list categories like service types or brands you carry; and lead form extensions, which allow users to submit their contact details directly from the search results page without visiting your website. Google decides which extensions to show on any given ad impression based on factors including the user's device, the search context, and which extensions are predicted to improve performance.
Extensions are important for ad quality and performance. Google's Ad Rank algorithm considers the expected impact of your extensions when determining where your ad appears and how much you pay per click. Ads with well-configured extensions typically achieve higher click-through rates, lower effective cost per click, and better Quality Scores than equivalent ads without extensions. For any South African business running Google Ads, ensuring extensions are fully configured is one of the easiest performance improvements available.
Ad Extension In Practice
The scenario below is an illustrative example, not a Juicy Designs client result. The figures indicate the scale of effect that ad extension work typically produces, so treat them as indicative rather than measured.
Picture a Pretoria-based plumbing company running a Google Search campaign targeting emergency plumbing queries. Without extensions, its ad would occupy a small amount of screen real estate. With a full extension set, the same ad grows substantially. A call extension would show the local number, allowing someone with a burst pipe to call directly from the search result without visiting the website. A location extension would confirm that the business serves Pretoria and surrounds. Sitelink extensions could point to "Same-Day Repairs", "Geyser Replacement" and "Get a Quote" pages. A callout extension might read "Available after hours", and structured snippets would list the services covered.
The likely result is an ad that occupies far more of the search results page, pushes competitors further down, and gives the user several ways to take action immediately. With a full extension set of this kind, the plumber's click-through rate could plausibly be something in the region of 30 to 50% higher than a plain ad competing for the same keywords. For audience targeting and campaign structure improvements that build on a well-configured extension setup, pairing extensions with proper keyword match types and retargeting audiences creates a complete search advertising strategy.
What ad extensions are
Ad extensions (now often called assets in Google Ads) are additional pieces of information that can be added to search ads to expand them beyond the basic headline and description, showing extra details such as links to specific pages, phone numbers, location information, additional text, prices, or promotions, which make the ad larger, more informative and more useful. By adding extensions, an advertiser can include more relevant information and more ways for the user to engage, for example, sitelink extensions add extra links to specific pages (like particular services or a contact page), call extensions add a phone number to enable calling directly, location extensions show the business's address, callout extensions add short highlights (like free delivery), structured snippet extensions list aspects of the offering, and price and promotion extensions show pricing or offers. Ad extensions are valuable because they make ads more prominent (a larger ad with more information takes up more space and stands out) and more useful (giving users more relevant information and more ways to act, such as calling or going straight to a relevant page), which tends to improve the ad's performance, including its click-through rate. Importantly, extensions also contribute to ad quality and can improve ad rank, and they are generally free to add (you pay for clicks as normal, not extra for the extensions). Understanding ad extensions matters because they are a straightforward, high-value way to enhance search ads, making them bigger, more informative and more effective at little or no extra cost, so knowing what ad extensions are, and using the relevant ones, is a basic and worthwhile part of running effective search advertising.
Using ad extensions effectively
Using ad extensions effectively means adding the extensions relevant to your business and goals, since they enhance ads at little or no extra cost and improve both prominence and usefulness, so there is generally little reason not to use the applicable ones. The valuable practice is to add all the extensions that genuinely apply to your business, since more relevant extensions give the ad more ways to inform and engage users, take up more space, and can improve ad rank and click-through rate. The most commonly important extensions for many businesses include: sitelink extensions (extra links to specific relevant pages, such as key services, products or a contact page, giving users direct routes and expanding the ad); call extensions (adding a phone number so users, especially on mobile, can call directly, valuable for businesses that take enquiries or bookings by phone); location extensions (showing the business's address, important for local businesses wanting to drive visits); and callout and structured snippet extensions (adding short highlights and lists of offerings that reinforce the value and provide more detail). Price and promotion extensions are useful where relevant (showing pricing or current offers). The extensions to prioritise depend on the business: a local service business benefits greatly from call and location extensions and relevant sitelinks; an ecommerce business from sitelinks, price and promotion extensions; and callouts and structured snippets suit most. On cost: ad extensions do not cost extra to add, you continue to pay per click as normal (and if a user clicks a sitelink or call extension, it is charged like a normal click), so extensions enhance ads without an additional fee for the extension itself, which is part of why using them is such good value. It is worth adding several relevant extensions, since the ad system shows the ones it judges most useful for each impression, so providing a good set of applicable extensions gives it options and maximises the chances of a richer, more effective ad. For a South African business, using ad extensions effectively means adding all the relevant extensions for its business, sitelinks to key pages, call extensions if it takes enquiries by phone, location extensions if it wants local visits, callouts and structured snippets to highlight its offering, and price or promotion extensions where applicable, so its ads are larger, more informative and more effective, at no extra cost. Because ad extensions enhance ads' prominence, usefulness and performance for free, using the relevant ones is a simple, high-value practice that any business running search ads should adopt, which is why setting up appropriate ad extensions is a basic part of good search advertising.
FAQ
Do ad extensions cost extra in Google Ads?
Adding extensions to your ads is free. You only pay when someone clicks on an extension link, at the same cost-per-click rate as your main ad. Extensions that show a phone number for direct calls are billed separately as call conversions. For South African advertisers, this means extensions add value to every ad impression at no additional setup cost.
Which ad extensions are most important for South African businesses?
Call extensions are critical for any business that takes phone enquiries, particularly given strong mobile usage in South Africa. Sitelink extensions help direct users to the most relevant page. Location extensions are essential for businesses with a physical presence in Pretoria, Cape Town, or Johannesburg. Callout and structured snippet extensions add credibility signals at no click cost.