Search campaigns show text ads on Google search for keywords you choose, with full control. Performance Max runs across Search, Shopping, YouTube, Display and more, choosing placements itself. Use Search for terms you must control, such as brand and top products, and Performance Max to reach wider demand.

Most Performance Max vs Search debates treat it as a choice of one or the other. For most stores it is a question of which searches belong in which campaign, and how to stop the two from bidding on the same shopper.

What is the difference?

The difference is what you control. In a Search campaign you choose the keywords, write the ads and decide which searches to pay for. In Performance Max you set a goal and supply assets, and Google decides where, when and to whom the ads show.

Google describes Search campaigns as text ads on search results that reach people while they are searching. It describes Performance Max as a goal-based campaign type that reaches all Google Ads inventory from a single campaign, bidding with Smart Bidding toward the conversion goals you define (as of October 2026).

Does Performance Max include Search?

Yes. Search is one of the channels Performance Max serves on, so a Performance Max campaign can show ads on Google search results without any keywords from you.

Google lists YouTube, Display, Search, Discover, Gmail and Maps as the inventory Performance Max can reach (as of October 2026). For online stores there is a further piece: Google says Shopping ads are managed through Shopping or Performance Max campaigns and use Merchant Center product data, not keywords. So a store’s Performance Max campaign usually shows both text ads and product ads on search results.

You can steer it a little. Search themes let you tell Performance Max which queries your customers use. They are optional, and you can add up to 50 per asset group (as of October 2026). They guide the campaign. They do not limit it to those queries the way keywords limit a Search campaign.

Which gives more control?

Search gives more control, by a wide margin. You decide the exact searches, the wording of each ad and the page each ad leads to. Performance Max offers guardrails, and the list has grown, but the day-to-day decisions stay with Google.

Match types are where Search control comes from. Google says exact match gives you the most steering over who sees your ad, though it reaches fewer searches than phrase or broad match (as of October 2026).

On the Performance Max side, Google confirms that campaign-level negative keywords are available in all Performance Max campaigns and apply to Search and Shopping inventory, and that search terms reporting is available for every Performance Max campaign (as of October 2026). Those two features make it far easier than it used to be to see where the campaign overlaps with Search.

When should you use Search?

Use Search for the queries where you need to decide the message, the landing page and the amount you pay, and where missing the click would cost you. That usually means your brand, your best sellers and anything that needs explaining.

• Your own brand name. People searching for you should see the ad you wrote and land where you choose. See Performance Max spending on brand searches for why this belongs in its own campaign.
• Top products and categories. If a few search terms bring in much of your revenue, keep them where you can see cost and return term by term.
• Products that need words. Custom, configurable or high-consideration items sell on details a product image cannot carry, such as lead time, warranty or installation.
• Offers and seasonal pushes. Search lets you put a specific promotion in front of a specific search on the day it starts.
• Anything without a product feed. Services, quotes, bookings and B2B inquiries have no feed for Shopping ads to draw on.

How this looks by business:

• A mattress brand keeps its brand name and “mattress in a box” style category terms in Search, where it can lead with its trial period.
• A B2B industrial supplier relies mainly on Search, because buyers type part descriptions and want a quote page, not a display ad.
• A home services company uses Search for urgent, local queries where the ad text and call option matter most.

When should you use Performance Max?

Use Performance Max when you have reliable conversion tracking, enough sales for the bidding to learn from and, for stores, a clean product feed. It suits accounts that have covered their known searches and want more reach.

Google itself positions it this way, saying you can use Performance Max to complement your keyword-based Search campaigns (as of October 2026). It fits well when:

• You sell many products and cannot write keywords for every one. The feed does that work.
• Shoppers find products like yours through images, video or browsing as well as searching.
• You have creative assets, or are willing to make them: images, short video, headlines.
• You are comfortable judging the campaign on overall return, since you cannot manage each placement.

By business:

• An apparel store with hundreds of items is a natural fit, since product ads and visual placements do much of the selling.
• A home decor store benefits from reaching people who are browsing for ideas before they search for a product.
• A store with a handful of sales a month may find it gives the system too little to learn from, and is often better served by tighter campaigns first.

For the full case for and against, including how it compares with Standard Shopping, see whether Performance Max is worth it for ecommerce.

Can they run together without competing?

Yes, if you set rules for which campaign handles which searches. Without rules they will overlap, and Performance Max tends to pick up the easy conversions.

Google publishes how it chooses between them. As of October 2026, the Performance Max help page and the search themes page say:

That gives a workable setup:

1. List the searches you must control. Brand, top products, top categories. Add them to Search as exact match keywords.
2. Fund the Search campaign properly. The exact match priority weakens if the campaign is limited by budget.
3. Add brand exclusions to Performance Max. This keeps your own name out of it entirely.
4. Use negative keywords for anything else you want kept out. They apply to Search and Shopping inventory in Performance Max.
5. Use one set of conversion goals. If the two campaigns count sales differently, you cannot compare them.
6. Review search terms in both campaigns monthly. Look for the same terms appearing in each, and decide which campaign should own them.
7. Change one thing at a time. Moving terms between campaigns shifts where sales are counted, so judge the result on the account total.

If you would like someone to map this out for your account, our Shopping Ads team handles Performance Max and feeds, and our Google Ads team handles Search. JuvioX works on a flat monthly management fee, month to month with no lock-in, and a free audit will show where your campaigns overlap today.

For a Shopify or WooCommerce store, Google Merchant Center setup means connecting your store through Google’s official integration (the Google & YouTube app on Shopify, Google for WooCommerce on WordPress), confirming your policies, contact details and shipping, then fixing product errors such as missing GTINs or broken variants. Most problems come from data that doesn’t match your website, not from the connection itself.

What Is Google Merchant Center Next, and What Changed?

Merchant Center Next is the current version of Merchant Center. Google replaced the classic experience with it and finished moving all retailers over by September 2024, so every new account is set up in the Next interface.

In practice, that means two things for store owners. First, many screenshots and videos online still show menus that no longer exist, so follow your platform’s current help pages instead. Second, Merchant Center is designed to pull product data straight from your store or a connected platform, which is why the Shopify and WooCommerce integrations below are the simplest route.

What You Need Before You Start

• A Google account you’ll keep long term (ideally a shared business login, not a staff member’s personal email)
• Admin access to your Shopify or WordPress store
• A live store with no password page, working checkout and real prices
• Visible contact details: phone, email, address or contact form
• Published refund/return policy, shipping policy and terms of service
• Product data: titles, descriptions, images, prices, stock, and brand, GTIN or MPN where they exist
• Your shipping rates and delivery times by region
• Optional: a Google Ads account if you plan to run Shopping or Performance Max ads

How Do You Connect Your Shopify Store to Google Merchant Center Next?

Install Google’s Google & YouTube sales channel in Shopify, connect your Google account, pick or create a Merchant Center account, and let it sync. Shopify’s help center says the channel syncs your products and store information to Merchant Center automatically.

Step 1: Meet Shopify’s Store Requirements

Shopify asks that your refund policy and terms of service live in Settings > Policies (not as standalone pages) and are linked in your footer menu using the Policies link type. You also need at least one visible contact method. The channel asks you to confirm the contact details yourself, and Shopify warns that confirming requirements you don’t actually meet can lead Google to suspend your Merchant Center account.

Step 2: Install the Channel and Connect Your Google Account

In Shopify admin, go to Sales channels > Google & YouTube and click Connect Google Account. Your Google account needs to be an administrator on the Merchant Center account, and multi-client (agency) accounts can’t be connected directly.

Step 3: Choose the Merchant Center Account and Verify Your Phone

Select an existing Merchant Center account or create a new one from the drop-down, then complete phone verification with a six-digit code. If you plan to run ads, decide whether shipping settings are imported automatically or set up manually in Merchant Center.

Step 4: Let Products Sync and Check for Errors

Shopify says the first sync can take up to 24 hours, and later changes usually sync within a few hours (as of October 2026). Products must be available on both the Online Store and the Google & YouTube channel. Open any product and look at the Google entry in its Sales channels section to see errors such as missing descriptions, images, GTIN or MPN.

How Do You Connect WooCommerce to Google Merchant Center?

Install the Google for WooCommerce extension, connect your Google account, Merchant Center and Google Ads, then set your audience, shipping rates and shipping times. The extension then sends your eligible products to Merchant Center.

Step 1: Connect Accounts and Grant Permissions

Connect your Google account and accept every requested permission; WooCommerce’s documentation notes the extension won’t work if any are refused. Existing Merchant Center and Google Ads accounts are detected so you can confirm them, or you can create new ones during setup. Be aware that settings you enter in the extension overwrite the matching settings already in Merchant Center.

Step 2: Set Your Audience, Shipping Rates and Shipping Times

Choose your target countries, then pick how shipping reaches Google. The recommended option syncs your WooCommerce shipping settings automatically, and regional (state-level) syncing is supported for the United States. You can also enter flat rates or manage rates in Merchant Center. Flat-rate advanced costs and carrier-calculated shipping aren’t supported by the sync, and you must enter a shipping time for every target country before you can save.

Step 3: Confirm the Connection

After setup, open the extension’s connection test page in your WordPress admin to confirm your Google account is connected. If products don’t arrive, check that WordPress cron and Action Scheduler are running, because the shipping sync depends on them.

https://example.com/wp-admin/admin.php?page=connection-test-admin-page

Should You Use the Official App or a Third-Party Feed App?

Start with the official integration; move to a feed app when you need control the official one doesn’t give you. The official apps are free, maintained alongside Google’s requirements, and fine for many stores with clean product data.

Switching apps rarely fixes disapprovals on its own: if a price or GTIN is wrong in your store, every app will send the same wrong value. Running two feeds that submit the same products also creates duplicates, so pick one source. Our guide to choosing product feed software compares the options in more detail.

How Do You Fix Missing GTIN Errors for Custom, Handmade or Private-Label Products?

If a product genuinely has no GTIN, don’t invent one. Google’s identifier_exists guidance says to set that attribute to “no” only for products with no GTIN, MPN or brand, such as custom T-shirts, art and handmade goods, and warns that products get flagged if an identifier does exist.

On Shopify, the GTIN usually goes in the variant’s barcode field; on WooCommerce, the field depends on your setup, so confirm which one your integration reads. For a fuller explanation of when you need one, see our guide to GTINs.

id: TEE-CUSTOM-001
brand: Example Studio
identifier_exists: no

How Do You Handle WooCommerce Variants With Different SKUs and Stock?

Send each variant as its own product with a unique ID, and give all variants of one product the same item group ID. Google’s item_group_id page says this is required for variants in US Shopping ads and free listings.

Make sure each variant carries its own price, availability, image and the attributes that make it different, such as color, size, material or pattern. Common WooCommerce problems are variants that all share one SKU as their ID, out-of-stock variants still sent as in stock, and the parent product sent alongside its variants. Example for a T-shirt sold in two colors:

id: TS-RED-M item_group_id: TS-100 color: Red size: M
id: TS-BLUE-M item_group_id: TS-100 color: Blue size: M

How Do You Change Product Titles in the Feed Without Changing Your Store?

On Shopify, the Google & YouTube channel lets you set product title and description preferences during setup; for fully custom Google titles, use a feed app that lets you edit the title field separately. Keep feed titles accurate to the product page, because Google compares what you submit with what shoppers see.

A good Google title leads with what the product is and the details shoppers search for: brand, type, key attribute, size or color. “Example Studio Organic Cotton Crew Tee – Navy, Men’s M” works harder than “The Weekender.” Our product feed optimization guide covers title formulas by category.

How Do You Set US Shipping Rates and Tax Without Getting Flagged?

Make the shipping costs and delivery times you give Google match your checkout, and leave sales tax out of US prices. Google’s tax guidance says not to include sales tax in the price for the United States, and to show applicable taxes at checkout instead.

• Tiered or regional rates: on WooCommerce, the shipping sync supports US regional rates; on Shopify, choose automatic import or set rates in Merchant Center during setup.
• Free shipping thresholds: make sure the threshold in Merchant Center is the same as on your site.
• Delivery times: use realistic handling plus transit days; promising faster delivery than you deliver creates mismatches.
• Returns: keep your return window and conditions identical on your policy page and in Merchant Center.

Mismatched shipping, prices or policies are also a common trigger for misrepresentation reviews. If that has already happened, our guides on fixing Merchant Center misrepresentation and getting a suspended account back walk through the recovery steps.

How Do You Test Your Google Merchant Center Setup and Fix Common Errors?

Check three places after the first sync: your store’s integration status, Merchant Center’s product issues, and a sample of live product pages. Fix the cause in your store, then let the next sync carry the fix.

For products that are approved but still invisible, our checklist on products not showing on Google Shopping goes deeper. And if your goal is free exposure before paying for ads, see how to get free product listings on Google.

What Does a Good Setup Look Like for Different Stores?

• Apparel store on Shopify: official channel, barcodes on every variant, color and size filled in, Google titles that include gender, fit and color.
• Handmade or print-on-demand shop: identifier_exists set to no only where there’s truly no GTIN, clear brand name, accurate production plus shipping times.
• Parts or equipment store on WooCommerce: manufacturer GTINs and MPNs, a feed app if the catalog has thousands of variants, regional US shipping rates synced from WooCommerce.

Once products are approved, the next step is turning them into sales with Shopping or Performance Max campaigns. If you’d like a second pair of eyes on your feed first, our Shopping Ads service runs month-to-month with no lock-in, and starts with a free audit.