Ad Extensions in Search Advertising: A Practical Guide

Ad extensions in search advertising are the single easiest way to make a paid search ad bigger, richer and more persuasive without raising your bid — and review-style trust signals are among the most valuable of them all. This guide explains what ad extensions (now often called "ad assets") are, why they matter for return on ad spend, and how to use them well across both Google Ads and Microsoft Advertising. Whether you run campaigns yourself or work with a digital marketing agency in Noida, the principles below stay true year after year.

Editor's note: this article began in 2017 as a news item about Microsoft's Bing Ads Editor v11.10 adding bulk support for Review Extensions, better keyword-match import and improved remarketing audience controls. Bing Ads was renamed Microsoft Advertising in 2019, and the specific "Review Extension" format has since been retired by Microsoft, so we have re-written the piece around the durable idea underneath: using ad extensions and ad assets to make search ads more trustworthy and more profitable. Treat the original v11.10 details as historical context, not current product state.

In plain terms: an ad extension (ad asset) is extra information — links, phone numbers, locations, prices, callouts or trust signals — that platforms can attach to a standard text ad to make it more useful and more clickable.

What Are Ad Extensions (Ad Assets) in Paid Search?

When you create a search campaign, the core ad is just a few lines of text. Ad extensions let the platform append additional, relevant details so your ad occupies more space on the results page and answers more of the searcher's questions before they even click. Google Ads now refers to these as assets; Microsoft Advertising still commonly calls them extensions. The concept is identical.

Crucially, adding extensions does not increase your cost-per-click. You pay the same when someone clicks, but a larger, more informative ad tends to earn a higher click-through rate — which in turn can improve your Quality Score / ad rank and lower the price you pay over time. That is why extensions are foundational to any well-run search engine marketing programme.

The Main Types of Ad Extensions

Both Google Ads and Microsoft Advertising support a similar family of extensions. The most commonly used include:

• Sitelink extensions — extra links to specific pages (Pricing, Contact, Categories), helping users jump straight to what they want.
• Callout extensions — short, non-clickable phrases that highlight selling points such as "Free Shipping" or "24x7 Support".
• Structured snippet extensions — a labelled list of features, services or brands you offer.
• Call extensions — your phone number, so mobile users can call you directly from the ad.
• Location extensions — your business address and map pin, valuable for footfall and local SEO-style intent.
• Price and promotion extensions — surface specific offers and price points, especially useful for e-commerce.
• Image extensions — a visual thumbnail beside the text ad.
• Review / trust signals — historically Microsoft's Review Extensions let advertisers quote a positive third-party review; today the same trust-building job is served by seller ratings, review-based assets and strong organic reputation. We cover this nuance below.

Why Review and Trust Signals Matter So Much

The original 2017 update was specifically about Review Extensions — and the reason advertisers cared is timeless: people trust other people. A credible, quoted endorsement next to your ad reduces hesitation at the exact moment a buyer is deciding where to click.

The format has changed, but the goal has not. Because Microsoft has since retired the classic Review Extension, the durable lesson is to build trust through every channel still available: collect genuine customer reviews, qualify for seller ratings, keep your Google Business Profile and review platforms healthy, and pair paid ads with a deliberate digital reputation management strategy. Trust signals on the results page only work when the reputation behind them is real, so treat reviews and online reputation management as part of the same funnel as your ad copy.

Keyword Match Types: Getting the Basics Right

The 2017 release also improved how the editor recognised keyword match types on import — a small detail that points to a big principle: match type controls who actually sees your ad, and getting it wrong wastes budget. The three classic match types remain central to paid search today.

Match type	How it behaves	Best for
Broad	Shows for related searches, synonyms and variations decided by the platform's AI.	Discovery and reach, when paired with strong negatives and smart bidding.
Phrase	Shows for searches that include the meaning of your phrase.	Balancing reach with relevance.
Exact	Shows for searches that match the intent of your exact term closely.	High-intent, high-value terms where precision matters.

A disciplined match-type and negative-keyword structure is what separates a profitable account from one that quietly drains spend. If you would rather not manage this in-house, you can hire a dedicated PPC expert to build and maintain it.

Remarketing and Audience Bid Adjustments

The third 2017 improvement let advertisers set audience bid modifiers directly when associating remarketing audiences with paid search campaigns. The underlying tactic — Remarketing in Paid Search — is still one of the most effective levers available: you bid more aggressively when someone who already visited your site searches again, because they are far closer to converting.

Modern platforms let you layer audience signals (past visitors, cart abandoners, existing customers) and adjust bids up or down for each. Used well, this concentrates budget where it earns the most return. It works best when your landing pages are built to convert — if you are getting clicks but not enquiries, read our guide on why website traffic doesn't convert into leads.

Google Ads vs Microsoft Advertising: Where Extensions Fit

Most advertisers start with Google because of its reach, but Microsoft Advertising (the platform that grew out of Bing Ads) often delivers lower competition and cost-per-click, and reaches a valuable desktop and professional audience. The extension toolkit is broadly comparable across both, so a sound strategy ports easily from one to the other. For a deeper comparison of the two big advertising ecosystems, see our breakdown of Google Ads vs Meta Ads and our full PPC and paid marketing guide.

Best Practices for Using Ad Extensions Effectively

1. Add every relevant extension. Platforms reward completeness; the more high-quality assets you supply, the more combinations they can test.
2. Keep them specific and honest. Real prices, real offers, real reviews. Never quote a review you cannot substantiate.
3. Match extensions to intent. Send sitelinks to the pages a searcher actually wants, not just your homepage.
4. Use shared assets for scale. Create an asset once and apply it across campaigns and ad groups, then update in one place.
5. Review performance regularly. Drop assets that underperform and double down on those that lift click-through rate.
6. Align paid with organic. Strong reviews, fast pages and clear content help both your ads and your SEO.

Increasingly, AI-driven bidding and asset selection decide which combinations show, which makes the quality of the inputs you provide more important than ever. Our overview of AI tools for performance marketing goes deeper on that shift.

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Frequently Asked Questions

What are ad extensions in search advertising?

Ad extensions, now often called ad assets, are extra pieces of information — such as links, phone numbers, locations, prices and trust signals — that a platform can attach to a text ad. They make the ad larger and more useful without changing your bid.

Do ad extensions cost extra?

No. You are not charged extra for adding extensions, and clicks on most extensions cost the same as a standard ad click. The benefit is a higher click-through rate and a more informative ad, which can improve performance over time.

Are Bing Ads Review Extensions still available?

Bing Ads was renamed Microsoft Advertising in 2019, and the original Review Extension format has since been retired. The goal it served — showing trust signals next to your ad — is now met through seller ratings, review-based assets and a strong overall online reputation.

What is the difference between broad, phrase and exact match keywords?

Broad match shows your ad for related searches and variations, phrase match shows it for searches that include your phrase's meaning, and exact match shows it for searches closely matching your exact term. Exact match offers the most control; broad offers the most reach.

What is remarketing in paid search?

It is the practice of adjusting your bids for people who have already visited your site when they search again. Because these users are closer to converting, bidding more for them typically improves return on ad spend.

Should I advertise on Google or Microsoft Advertising?

Both are worthwhile. Google offers the largest reach, while Microsoft Advertising often has lower competition and cost-per-click and a strong desktop and professional audience. Many advertisers run both, since a sound extension and keyword strategy transfers easily between them.

Ad extensions are a small lever with an outsized impact: they make your ads more trustworthy, more clickable and more cost-efficient. If you want a paid search programme built on these fundamentals — and aligned with your SEO and reputation — our team in Delhi NCR can help. Call +91-8010010000 or contact Brainguru Technologies to discuss your goals.