Google Ads Promotion Extensions: The UK Setup Guide

You're preparing a UK sale campaign, the landing page is ready, and the search ads are approved. Then someone asks why the headline doesn't make the offer obvious. A standard text ad may mention the product and brand, but it won't necessarily give a shopper an immediate, structured view of the discount, code, or deadline.

That's where promotion extensions, now called promotion assets in Google Ads, fit. They give eligible Search ads a dedicated place for sale information, but the commercial result depends on more than switching the asset on. The offer must be genuine, the dates must align, and your measurement must distinguish incremental sales from demand that would have converted anyway.

What Promotion Extensions Are and Why UK Advertisers Use Them

A UK ecommerce manager preparing a Bank Holiday sale may need to show a percentage discount, voucher code and closing date, while the main ad explains the product. Promotion assets, formerly called promotion extensions, give those sale details a separate, structured treatment beside the core message.

A promotion asset is a clickable addition to an eligible Search ad. It can show a percentage discount, money off, promotion code, landing page, and start or end date. UK-focused guidance describes the format as a way to place limited-time sales beneath a Search ad, often with a promotional tag icon. The available fields and UK examples appear in this guide to Google Ads promotion assets.

The account structure determines who sees an offer. Google Ads allows assets at account, campaign, or ad group level, and the most specific applicable asset takes precedence when several are available, according to Google's promotion asset documentation. An account-level asset can cover a sitewide event. A campaign-level asset can support one category, while an ad group-level asset can match a narrower product theme.

A practical example is a retailer running one general sale across the site, with a separate offer for electrical products and another for a specific brand. Assigning each asset at the right level reduces the risk of showing a valid discount on the wrong search.

Why the format matters in the UK

UK advertisers compete in a substantial and expanding market. The Advertising Association and WARC reported total UK advertising investment of £42.6bn in 2024, up 10.4% year on year, in the UK Advertising Association/WARC Expenditure Report. That pressure makes clear promotional presentation useful, although an asset cannot compensate for a weak offer or mismatched landing page.

Promotion assets fit dated events such as Black Friday, Boxing Day, and Cyber Monday. They can make the commercial message easier to scan, but teams still need to align the asset dates with stock, landing-page terms and any later extension to the promotion. In account work, that alignment often matters more than adding another piece of ad real estate.

Benefits and Strategic Use Cases for UK Campaigns

A shopper searching “Boxing Day furniture sale” needs the offer answered quickly. A promotion asset can put the commercial reason to click beside the ad, so the headline does not need to carry every detail. It works like a price label attached to the search result, improving clarity when the promotion is stronger than a general brand message.

Where UK teams use them

An ecommerce retailer could use a money-off asset for clearance stock, a percentage-off asset for a seasonal category, or a promotion code for a first-order offer. For Boxing Day, connect the asset to a sale page with matching dates and terms. For Cyber Monday, use the same code across the asset, landing page and email programme. In account work, mismatched codes create avoidable hesitation and support queries.

The format also suits some B2B campaigns. A company could promote a time-limited consultation or seasonal contract incentive, provided the terms are clear and apply to the audience receiving the ad.

UK advertising is a crowded market, particularly during concentrated retail windows. As noted earlier, investment reached £42.6bn in 2024, with 10.4% year-on-year growth, and £11.7bn in Q1 2026, with 9.3% growth, according to WARC expenditure data. That context explains why a small asset-level improvement can matter, but it does not make an uncompetitive offer profitable.

The limitations to plan around

Promotion assets do not guarantee more clicks or sales. They can compete with other assets, while overlapping discounts may confuse shoppers. Too many promotional treatments can also weaken the ad's hierarchy when price, sitelinks, callouts and promotion details appear together.

Google controls when and where assets serve. Campaign dates and asset dates therefore need to work together, especially for short retail events. If a Boxing Day promotion is extended, the close date and advertised terms must remain accurate under UK advertising requirements. A Cyber Monday asset left live after the code expires can create both compliance and measurement problems.

Finally, promotional traffic may contain bargain-led shoppers who do not fit the margin or customer lifetime value model. Compare performance with the wider campaign, checking whether the asset creates additional conversions or captures clicks that would have happened through the main ad.

Account-work rule: Use the asset when the offer changes the shopper's decision. Do not add one simply because the interface makes it available.

Setting Up Promotion Extensions Step by Step

Google's current interface uses the name Promotion assets, although many UK advertisers still search for “promotion extensions”. Start in the campaign navigation and open Ads & assets, then select Assets. Choose the promotion asset type, create a new asset, and decide whether it applies at account, campaign, or ad group level.

The scope should reflect the offer. An account-level asset is suitable for a sale that applies across the whole website. A campaign-level asset works for a category-specific promotion. An ad group-level asset is appropriate when one product group has a different code, discount, or eligibility rule.

Build the offer fields carefully

Google supports structured promotional fields including percent_off, money_amount_off, promotion_code, orders_over_amount, redemption details, and explicit end dates, as reflected in the Google Ads policy and promotion requirements. In the interface, choose the promotion type that accurately describes the offer, such as percentage off, money off, free delivery, free gift, or sale price.

Then complete the commercial details:

1. Select the discount format and enter the actual discount value.
2. Add the promotion code if customers need one.
3. Set the qualifying purchase condition, using GBP where the UK offer requires a monetary threshold.
4. Enter the start and end dates.
5. Choose an eligible occasion, such as Boxing Day or Cyber Monday, where it accurately describes the campaign.
6. Add the relevant language and landing page.
7. Use the in-store option only when the promotion applies in physical locations.

The landing page should repeat the offer, code, qualifying conditions, and dates in plain language. For related Merchant Centre work, follow the process in this guide to setting up Google Ads promotions in Google Merchant Centre.

Before submitting, check for avoidable rejection triggers:

• Match the discount: The asset, headline, landing page, and checkout must show the same offer.
• Show the terms: The destination should make qualifying conditions easy to find.
• Use valid dates: The asset must not run outside the promotional window.
• Choose the right type: Don't force a free gift or sale price structure onto an offer that doesn't meet it.

Optimising Copy, Timing and Targeting

A retailer can have a strong Boxing Day offer and still lose sales if the asset runs after stock sells out, targets the wrong searches, or cannot be measured separately. Treat promotion assets as four connected controls: copy, timing, targeting, and tracking. Each one affects whether the offer creates useful demand or redirects clicks that would have happened anyway.

Copy should answer the value question quickly

Lead with the commercial benefit. Shoppers should immediately understand whether the asset offers a percentage discount, a pound saving, free delivery, or another defined benefit. Keep conditions brief, but retain any requirement that changes who can redeem the offer.

Where the account structure permits, test suitable copy variants. Reviewing asset-level delivery and interaction data then becomes more useful than treating every promotion as one message. For wider guidance, see these Google Ads copy best practices.

Timing needs an owner and a checklist. Align the asset dates with the promotion, campaign schedule, landing page, stock position, CRM messages, and any Merchant Centre promotion. A Cyber Monday asset that remains active after the offer ends creates avoidable confusion. The same applies when the ad has stopped but the landing page still displays an expired code.

Match scope to the commercial job

Use account-level scope for a genuine brand-wide sale. Choose campaign-level scope when only one category or range qualifies. Ad group-level scope suits tightly differentiated products and terms, though it increases maintenance and the risk of inconsistent dates.

Seasonal calendars need the same discipline. Boxing Day and Cyber Monday may sit close together, yet they can have different prices, codes, stock levels, and delivery promises. Give each promotion a distinct identifier in the final URL suffix or tracking template, then carry it into Analytics and reporting.

Keep the UK experience consistent with UK English, GBP where relevant, and regional terms that match the offer. A simple audit question helps: could an analyst identify a promotion-assisted click without opening the ad manually? If not, tighten the naming convention and URL parameters. That makes later lift-versus-cannibalisation analysis more credible.

The video below shows the broader workflow for promotional messaging in paid search:

Measuring Performance and KPIs That Matter

A Boxing Day promotion can lift clicks while changing which ad receives an existing customer's attention. Click volume alone cannot show whether the asset created new demand or redirected demand that would have converted anyway. Google's interface helps review asset-level delivery, but the useful comparison is between users exposed to the promotion and a credible baseline.

Track impressions, clicks, click-through rate, conversion rate, cost per conversion, and revenue where revenue tracking is available. Compare the promotion-enabled experience with a control using the same commercial conditions but without the promotion asset. A before-and-after view can diagnose change, yet it cannot isolate causation when sale demand, budgets, competitors, and search behaviour shift together.

The wider UK advertising market makes this discipline more important. As noted earlier, investment continues to grow, so SMEs need evidence before giving an asset more landing-page, creative, or media support.

Avoid invented benchmark ranges. Establish a baseline before launch, record the offer conditions, and test the asset so you can estimate lift versus cannibalisation. Geo holdouts, matched campaign experiments, and controlled asset removals provide stronger evidence than observing higher sales during Black Friday or Cyber Monday. A promotion that raises click-through rate but leaves incremental conversions unchanged may be improving the ad's appearance, not commercial performance.

Use these campaign performance metrics alongside asset-level results when building the report. The final decision should weigh profit, customer quality, and incremental revenue, rather than rewarding a higher interaction rate alone. This also gives seasonal planning a clearer test: compare a Boxing Day asset with its own baseline, rather than assuming every calendar peak proves the asset worked.

UK Compliance and Offer Integrity Considerations

A promotion asset may pass Google's review yet still create a UK advertising problem. The Advertising Standards Authority says promotional closing dates should not normally change. UK consumer protection rules also restrict changing or extending a time-limited offer when customers acted under its original terms. Read the UK guidance on changing ongoing promotions before repeatedly updating seasonal sales.

Suppose the asset states “Ends 28 November”. The landing page, checkout, and terms should show and enforce that same deadline. Rolling the offer forward with a new code can still mislead customers if the original promotion was presented as final. If circumstances outside the trader's reasonable control make a change unavoidable, document the reason and review the revised terms carefully. UK promotional rules under the Consumer Protection from Unfair Trading Regulations and the UK Advertising Codes make offer integrity an operational responsibility, not a copywriting choice.

Build a date-alignment check

Before launch, compare the asset with each customer-facing surface:

• Dates: Match the start and end dates in the asset, ad copy, landing-page hero, terms, and email confirmation.
• Price wording: Ensure “up to”, “from”, “selected products”, and similar qualifiers describe the same offer everywhere.
• Final price: Show the applicable selling price clearly, including VAT where the audience expects an inclusive consumer price.
• Urgency: Use countdowns, “last chance”, and stock wording only when they accurately reflect availability and timing.
• Evidence: Retain support for “was/now” pricing, stock statements, and qualifications attached to the discount.

If a customer sees a deadline in the Search result, treat it as a promise. Every downstream touchpoint must honour it.

Seasonal pressure can make teams extend Boxing Day or Cyber Monday offers after the stated close. That decision needs a fresh compliance review, not only a revised asset. For an accessible overview of the wider rules, review this guide to UK advertising regulations. The PPC manager, ecommerce team, legal reviewer, and CRM owner should work from one promotion brief before launch.

Promotion Extensions Versus Other Ad Extensions

UK advertisers often group several different formats under the word “promotion”. They don't all solve the same problem. A promotion asset is strongest when you need to communicate a structured, time-bound discount or code. A price asset is better when the product price itself is the primary decision factor, while an image asset can provide visual context without replacing the offer structure.

The important distinction is structure versus general messaging. A promotion asset can carry a defined percentage discount, monetary saving, code, or order threshold. A sale message may communicate the event more broadly, but it may not provide the same structured redemption detail.

When combining formats helps

Stacking can make sense when each asset has a separate job. For a Cyber Monday campaign, a promotion asset might communicate the code, a price asset might show selected products, and an image asset might reinforce the range visually. The combination becomes counterproductive when every asset repeats the same discount or competes for the same limited attention.

Check the rendered ad rather than assuming all assets will appear together. Google decides which eligible assets serve, and visual clutter can weaken the message. Give the promotion asset priority when the discount is the key reason to click. Give price information priority when shoppers are comparing products or packages.

Troubleshooting and Your Next Steps

Promotion assets commonly underperform for reasons that are operational rather than strategic. Google may flag inconsistent promotional language, the asset may have dates outside the campaign window, or the destination may fail to show the offer clearly. An eligible asset can also receive limited delivery when several competing assets serve in the same account structure.

Fix the issue at its source

Start with the exact wording shown to the customer. If the asset says a percentage discount applies across a category but the landing page headline limits it to selected products, rewrite one of them so the qualification is unambiguous. If the asset says a code is required, test the code in the checkout rather than assuming the page is sufficient.

Then inspect delivery settings:

• Disapproved asset: Review the offer, destination, dates, eligibility, and relevant Google and ASA requirements.
• Low eligibility: Shorten unclear copy, remove unnecessary qualifiers, and make the commercial benefit obvious.
• Low impressions: Check campaign status, targeting, budget, dates, and whether another asset is competing for the same placement.
• Overlapping offers: Decide which promotion owns the campaign or ad group, then remove contradictory assets.
• Invalid destination: Test the final URL on mobile and confirm that the offer remains visible after the page loads.

A practical launch sequence

1. Audit existing promotion assets and record their status, scope, dates, and landing pages.
2. Draft the new offer using Google's structured fields rather than hiding every detail in free-form copy.
3. Match the asset to a confirmed seasonal window, such as a real Boxing Day or Cyber Monday sale.
4. Test the landing page, code, dates, price, and qualifying terms before activation.
5. Measure asset delivery against a defined baseline or control.
6. Recheck compliance before every seasonal push, especially if stock, dates, or terms change.

PPC Geeks offers Google Ads account audits, campaign management, conversion tracking, landing-page support, feed optimisation, and reporting for UK SMEs and ecommerce brands. If you want help testing promotion assets without losing sight of incrementality or UK compliance, visit PPC Geeks to discuss your account and upcoming promotional calendar.