Google Shopping Ads 2026: Merchant Center Setup, Budget and ROAS Guide
Shopping ads run on your product data, not keywords. A step-by-step walkthrough from Merchant Center setup and feed preparation to budgeting and calculating ROAS.
When you search for a product on Google, you see small cards with photos and prices at the top of the results. Those are Google Shopping ads. Before clicking, the shopper already knows what the product looks like, what it costs and which store sells it. That is why the clicks they generate usually come from purchase intent rather than curiosity.
These ads work on a different logic from classic search ads, though. You don't build keyword lists or write ad copy; you give Google clean, accurate and up-to-date product data. The better that data, the more relevant the searches your ads appear in. A small error in the data, on the other hand, can get a product disapproved entirely.
In this article we walk through Merchant Center setup, how to prepare a product feed, the most common disapproval reasons, the difference between free listings and paid campaigns, and how to work out your budget and ROAS. We finish with a furniture business example to answer the question: should you do this yourself or hand it to an agency?
What are Google Shopping ads and how do they differ from search ads?
With search ads you pick keywords such as "corner sofa set" and ask for your text ad to appear when those terms are searched. With Shopping ads you don't pick keywords. Google looks at your product title, description, category and other attributes and decides on its own which searches to show your product for.
The practical consequence: most Shopping optimisation happens in the product data, not in the ads dashboard. A product titled "Sofa 3" and one titled "Mira 3+3+1 Velvet Sofa Set Anthracite" will deliver very different results on the same budget.
- Search ads: Keywords + text. Strong for service businesses and brand searches.
- Google product ads (Shopping): Product data + image + price. Strong for businesses selling physical products, especially online stores.
- Performance Max: An automated campaign type that uses your product feed to serve ads across Search, Shopping, YouTube, the Display Network and Gmail at the same time.
If you want the basics of search advertising, take a look at our Google Ads guide; Shopping campaigns are managed from the same Google Ads account.
What is Google Merchant Center and how do you set it up?
Merchant Center is a free dashboard where you upload your product information to Google. Both free listings and paid Shopping ads are fed by the data stored there. Put simply, if Google Ads is the engine, Merchant Center is the fuel tank.
- Create an account: Sign in to Merchant Center with the Google account your business uses. Where possible, use an account tied to a company email rather than a personal one.
- Complete your business information: Business name, address, phone number and customer service contact details should all be filled in.
- Verify and claim your website: You can do this via Google Search Console, an HTML tag or the Google tag.
- Set up shipping: Delivery regions, times and costs. For bulky items such as furniture you may need different rates per region.
- Add your returns policy: It must match the returns page on your website exactly.
- Upload products: Manually, via Google Sheets, through an automated feed (an XML/CSV URL) or through your e-commerce platform's integration.
- Link your Google Ads account: Essential if you plan to run paid campaigns.
How to prepare a Merchant Center product feed
A feed is a structured list where each row is one product. Some fields are required and some are optional, but filling in the optional ones helps your products appear in more relevant searches.
| Field | What it does | What to watch |
|---|---|---|
| id | The product's unique code | Never change it once set, or the product's performance history resets. |
| title | The most important matching signal | Brand + product type + model + key attribute (colour, size, material). |
| description | Describes the product in detail | Write product information, not promotional slogans. |
| link | Product page URL | A working, mobile-friendly page that goes straight to the product. |
| image_link | Main image | A clear photo with no text, watermark or logo overlay. |
| price / availability | Price and stock | Must match the website exactly. |
| brand, gtin, mpn | Product identifiers | If you make your own products and they have no barcode, state correctly that there is no GTIN. |
| item_group_id, color, size | Groups variants | Always use them for products with colour and size options. |
| product_type | Your own category structure | Very useful for grouping products within campaigns. |
A title example: instead of "Dining Table", write "Wooden Extendable Dining Table 160x90 Walnut 6-Seater". You answer the details the shopper is looking for and tell Google which searches to match the product with.
Common product disapprovals and how to fix them
Seeing a "disapproved" warning in Merchant Center is very common. Most disapprovals come down to a handful of recurring causes:
- Price mismatch: The feed price differs from the page price. Updating a sale price on the site and forgetting the feed is the classic mistake. An automated feed plus correctly implemented structured data on the page solves most of this.
- Availability mismatch: The feed says "in stock" while the page says "sold out".
- Image issues: Images with "Sale" text, watermarks or collages may be rejected.
- Landing page unavailable: The page loads slowly, breaks on mobile or blocks Googlebot.
- Missing shipping or returns information: These details aren't clear in your Merchant Center settings or on the site.
- Misrepresentation: If your site lacks contact details, company information or return terms, you risk an account-level suspension. That is far more serious than individual product disapprovals.
Policy details change from time to time, so when you receive a disapproval message the best move is to read the relevant section of the Google Merchant Center Help Centre.
Free product listings vs paid campaigns
When you upload products to Merchant Center and enable free listings, your products can appear on the Google Shopping tab and some other Google surfaces without paying for ads, depending on availability in your country. Free product listings are a no-cost starting point that Google offers, but you have little control over visibility.
- Free listings: No cost and simple to set up, but ranking and placement are not in your hands. A good way to test whether your feed is healthy.
- Paid campaigns: You appear in sponsored placements above the search results. Budget, bidding strategy, which products get priority and negative keywords are all under your control.
What to watch in Merchant Center in 2026
Google has recently simplified the Merchant Center interface and is moving more accounts to the new-generation dashboard. For businesses with physical stores, local inventory and free local listings have become more important. They can let you share in-store stock data with Google and appear with information such as "in stock at a store near you".
This usually requires your Google Business Profile to be linked to Merchant Center and store-level stock data to be supplied. It is especially valuable for furniture businesses with a showroom. If you haven't optimised your profile yet, our Google Business Profile guide is a good place to start. Availability and conditions for these features vary by country and can change, so check the current options inside Merchant Center before setting anything up.
Google Shopping ads cost and starting budget
With Shopping ads you pay per click. Cost per click depends on your industry, the number of competitors, product price and the quality of your feed. That makes a fixed price impossible to quote, but we can sketch a rough frame for planning. The figures below are observations from the Turkish market, in Turkish lira.
- Test phase: For a small business, a daily budget of a few hundred TL up to 1,000 TL is usually enough to gather data over the first 3-4 weeks.
- Scaling: Once it's clear which products drive sales, you shift budget to the product groups that pay off.
- Management fee: If you work with an agency, there is a monthly management fee on top of ad spend; depending on scope, this can range from a few thousand TL to several tens of thousands of TL per month.
A healthier way to set a budget is to start from "What's the most I can pay to acquire a sale?" rather than "How much should I spend?" That brings us to ROAS.
How to calculate ROAS and what it should be
ROAS (return on ad spend) is calculated by dividing the revenue generated by ads by the ad spend.
ROAS = Revenue from ads / Ad spend
Example: in one month you spent 20,000 TL on Shopping ads and they generated 100,000 TL in revenue. ROAS = 100,000 / 20,000 = 5. In other words, every 1 TL spent brought in 5 TL of revenue.
But revenue is not profit. What matters is knowing your break-even ROAS:
Break-even ROAS = 1 / Gross profit margin
If your gross margin is 25%, your break-even ROAS is 4. So when ROAS drops below 4, the ads are losing money (and once you add shipping, returns and commission costs, that threshold rises further). Set your target ROAS based on this calculation, not on a number you heard from someone in another industry.
Furniture example: do it yourself or hire an agency?
Picture a furniture manufacturer in İnegöl, one of Türkiye's main furniture production hubs, selling hundreds of products on its website. Most products come in colour and size variants, shipping costs vary by region, and some items include assembly. This is one of the toughest scenarios for Shopping ads: variant management, bulky-item shipping, self-made products without barcodes and prices that change frequently during promotions.
| Criterion | Doing it yourself | Hiring an agency |
|---|---|---|
| Cost | No management fee, ad spend only | Ad spend + monthly management fee |
| Time | You need to set aside regular hours for setup and weekly monitoring | You only provide approvals and product information |
| Feed and disapproval issues | Learning curve, higher chance of mistakes | Resolved faster through experience |
| Product knowledge | You know the product best | A good agency has to get this information from you |
| Best suited when | Few products, limited budget, time to learn | Many products and variants, serious budget, no in-house specialist |
A practical route: set up Merchant Center and free listings yourself and make sure the feed is clean. When you move to paid campaigns, bring in professional help if your budget is growing or disapprovals have become unmanageable. You can read about our digital marketing approach for this sector on our furniture industry page.
Then there's the platform question. If your online store can't generate an automated feed, your product pages lack structured data or pages load slowly, you'll run into problems no matter how well the ads are managed. If you haven't built your site yet or are planning a rebuild, our article on how to build an e-commerce website covers what to look out for.
Quick checklist before you start
- Are your contact, returns, shipping and distance selling terms pages complete?
- Do product pages load quickly and work properly on mobile?
- Are feed prices and stock levels synced automatically with the site?
- Do product titles include brand, type, model and key attributes?
- Is conversion tracking working correctly, including purchase value?
- Do you know your break-even ROAS?
If you answered "not sure" to even one of these, the most sensible place to start is your website. Our free Site X-Ray tool scans your site with more than 40 checks, shows the top 10 issues instantly and emails you the full report. Many of the causes behind Merchant Center disapprovals show up in these checks. If you'd rather leave the advertising side to professionals, take a look at our digital continuity service, where Fietto Creative manages Google and Meta ads together with SEO, or get in touch with us directly for a proposal tailored to your business.
Frequently asked questions
Do I need an e-commerce website to run Google Shopping ads?
For paid Shopping ads you need a product page where the item can be bought, or at least where the price and availability are clearly shown. Businesses that only have physical stores can look at local inventory options, but you should check the eligibility requirements inside Merchant Center first.
Does it cost anything to open a Merchant Center account?
No. Opening a Merchant Center account and uploading products is free. You only pay when you launch a paid campaign through Google Ads, and then you pay per click.
Why do my products show as 'pending' in Merchant Center?
Newly uploaded products go through Google's review process, which can take a few days. If they stay pending for a long time, check whether anything is missing in your website verification, business information or shipping settings.
Can I choose keywords for Shopping ads?
Not directly. Google decides which searches to show your products for based on feed data such as the product title, description and category. What you can do is exclude irrelevant searches with negative keywords.
