Google Ads for Ecommerce: The Campaigns, Feed and Bidding Plan

Google Ads for ecommerce comes down to three things: a clean product feed, conversion tracking that reports real order values, and campaigns that bid on profit instead of clicks. Get those right and the campaign type matters less than people think. Get them wrong and no campaign type saves you.

This guide covers the campaigns a store should run, the order to build them in, and the bidding setup that keeps the account profitable as it grows.

How Google Ads work for an online store

A store is different from a service business in one big way: you sell products, so Google can show the product itself. A Shopping ad shows a photo, title, price and your store name. Google's help page says this gives shoppers "a clear view of your product before they click."

Shopping ads also work differently from text ads. Google says they use "your existing Merchant Center product data (not keywords) to decide how and where to show your ads." So for a store, the product feed does the job keywords do for everyone else. A bad title or a missing attribute is a missed search.

The ecommerce Google Ads campaign types

Shopping vs Performance Max

Both need a Merchant Center feed. The difference is control.

Shopping shows on Google Search next to the results, and on search partner sites if you include them. You build product groups and set bids by group. Reports show product by product what happened. Google charges per click.

Performance Max is what Google calls a goal-based campaign that accesses "all Google Ads inventory, including YouTube, Display, Search, Discover, Gmail, and Maps, from a single campaign." It uses your feed plus images, text and video you give it. It reaches more places with less work, and tells you less about where the money went. More on that trade in our Performance Max explainer.

One rule worth knowing: Google says a Search campaign with an exact match keyword gets priority over Performance Max when a search matches that keyword exactly. Your exact match brand keywords keep their traffic even with Performance Max running.

Search campaigns for stores

Run a brand Search campaign from day one. It is usually the cheapest traffic in the account, and if you do not bid on your name, rivals can. Non-brand Search earns its place later, on the category searches where text ads still convert, like "waterproof hiking boots women".

Merchant Center and the product feed come first

Before any Shopping ad runs, you need Google Merchant Center and a product feed. The feed is a list of your products with their details. On Shopify, the Google & YouTube app syncs it for you.

Feed basics that move results:

• Titles that match searches. Put the product type, brand and key attribute early: "Women's Waterproof Hiking Boot - Leather - Brown", not "The Explorer".
• The right identifiers. GTIN (the barcode number on the product) and brand, where the product has them.
• Accurate price and stock. A price mismatch with your site gets products disapproved.
• Shipping and returns set up. Google lists countries where shipping settings are required for free listings, and both help shoppers decide.
• Custom labels by margin. Tag every product high, medium or low margin, so you can bid on profit. Our Labelizer playbook shows how.

Merchant Center also gives you free listings. Google says eligible products can show at no cost on Search, the Shopping tab, Images, Lens, YouTube, Maps and Gemini. New accounts are opted in by default. Free traffic, from the same feed.

Tracking: real order values or nothing

Ecommerce bidding runs on conversion value. If your tracking sends a value of 1 for every order, Google treats a $15 order and a $400 order the same.

Check three things:

1. Purchase is your one primary conversion, with the real order value and currency.
2. No double counting from an app plus an old theme tag.
3. Enhanced conversions are on, so more sales are matched back to clicks.

Our Google Ads conversion tracking guide walks through each one, with the Shopify setup.

Bid on profit, not revenue

ROAS (revenue divided by ad spend) is the number Google optimizes. Profit is the number you bank. They are not the same.

Find your break-even ROAS first. Break-even ROAS is 1 divided by your margin. A product with a 40% margin after product cost, shipping and fees breaks even at a ROAS of 2.5. Below 2.5 you lose money on every sale, even though the ads "make revenue". Work out yours with the break-even ROAS calculator.

Then split products by margin. Put high-margin and low-margin products in separate campaigns or asset groups with different ROAS targets. One ROAS target across a whole catalog quietly overspends on thin-margin products and underspends on the profitable ones.

Use value-based Smart Bidding once you have data. Maximize conversion value, then add a target ROAS when you know what works. Google says Smart Bidding needs a 7 to 14 day learning phase, and frequent target changes reset it. Move targets in small steps.

The order to build an ecommerce Google Ads account

1. Tracking, with real values, tested with a real order.
2. Merchant Center, with a clean feed and free listings on.
3. Brand Search campaign.
4. One Shopping or Performance Max campaign for your best products.
5. Split by margin once you have a few weeks of data.
6. Non-brand Search on proven categories.
7. Remarketing, YouTube and Demand Gen once the core earns money.

The common mistake is starting at step 7. Prospecting video before your Shopping campaign is profitable is how a small budget disappears.

Google Ads Dropshipping stores: what changes

Google Ads Dropshipping uses the same campaigns, with two extra risks. Merchant Center is stricter on shipping times, returns and business details, so suspensions are more common. And margins are often thinner, which makes the break-even ROAS higher. Our Google Ads Dropshipping hub covers the setup and the fixes for the usual suspensions.

Metrics to watch every week

Run it yourself, or get help

A store can run all of this in house. The setup is a few days. The weekly checks are what decide profit. If you want help with that part, Scaley is an AI media buyer for Google Ads built for stores, and our page for DTC brands shows how it fits. Scaley Media Buyer connects read-only and answers questions like "which products spent money with no sales this month" from your live account. Scaley Suite suggests fixes and makes each change only after you approve it. All three tiers are on the pricing page, and you can start the free trial.

Disclosure: Christopher Krassnig, who founded Scaley, also runs ZenoX Media, a Google Ads agency for ecommerce brands. The order of steps above is the order the team builds accounts in.

Where these facts come from

Checked on 2026-10-08:

• About Shopping ads, Google Ads Help - Shopping ads use Merchant Center data, not keywords, what a Shopping ad shows, and how Shopping and Performance Max differ.
• About Performance Max campaigns, Google Ads Help - the channel list and exact match priority over Performance Max.
• About Demand Gen campaigns, Google Ads Help - the surfaces Demand Gen runs on.
• Free listings for products, Merchant Center Help - where free listings show and the default opt-in.
• About conversion measurement, Google Ads Help - the Smart Bidding learning phase.
• About average daily budgets, Google Ads Help - the daily and monthly spend limits.