Google Shopping Ads and Merchant Center

Google Shopping Ads are product ads that show a photo, title, price and store name on Google search results and the Shopping tab, built from product data you keep in Google Merchant Center. This tutorial sets up Merchant Center, builds a product feed, fixes common disapprovals and launches a first Shopping campaign in Google Ads.

• Merchant Center: Where your store details, shipping, returns and product feed live.
• Feed: A list of every product with its title, price, image, stock and identifiers.
• Google Ads: Where you create the campaign, set the budget and choose bidding.
• Matching: Google matches searches to products using the feed, so feed quality decides reach.
• Campaigns: Standard Shopping or Performance Max can both use the same feed.

This tutorial follows one example: a D2C leather footwear brand from Kanpur that sells loafers, sandals and formal shoes for men and women on its own Shopify store. It accepts UPI, cards and cash on delivery, and wants its shoes to appear when people search for leather footwear on Google.

Prerequisites for Google Shopping Ads

• Store: A live website with product pages, prices in rupees, a checkout and clear contact details.
• Policies: Visible return, refund and shipping policies on the website.
• Accounts: A Google Ads account and a business Google account to create Merchant Center.
• Tracking: Purchase tracking with order value, set up in Google Ads conversion tracking.
• Photos: Clear product images on a plain background with no added text or watermarks.

Setup: Create and Verify Merchant Center

1. Go to Google Merchant Center and create an account with the business name and country set to India.
2. Website: Add the store's address and verify and claim it, either through the Shopify app, a tag, or Search Console.
3. Shipping: Add shipping rules, such as delivery times and charges by order value, matching what checkout actually shows.
4. Returns: Add the return window and conditions, the same as the returns page on the site.
5. Business: Add a phone number and business address, since Google may ask to verify them.

Step-by-Step: Build the Feed and Launch

Step 1: Choose How to Send Products

• Apps: Shopify and other platforms have Google apps that sync products automatically. This suits most small stores.
• Google Sheets: A sheet template, useful for small catalogues without a platform app.
• Files: A scheduled file or the Content API, used by larger catalogues and custom sites.

Step 2: Fill in the Key Attributes

Each product needs these attributes. The example below is one row of the footwear brand's feed:

id:            KNP-LOAF-TAN-09
title:         Men's Tan Leather Loafers, Handstitched, Size 9
description:   Full grain leather loafers with a cushioned insole...
link:          https://example.com/products/tan-leather-loafers
image_link:    https://example.com/images/tan-loafers-9.jpg
availability:  in_stock
price:         2799.00 INR
brand:         [Brand name]
identifier_exists: no
mpn:           LOAF-TAN
condition:     new
color:         Tan
size:          9
gender:        male
age_group:     adult

• Title: Put what the product is first, then material, colour, key feature and size, following product feed optimization with AI.
• Identifiers: Own-label shoes without barcodes state that no identifier exists. Never invent a GTIN.
• Variants: Footwear needs colour, size, gender and age group so Google can show the right variant.

Step 3: Fix Diagnostics

Open the products diagnostics area and fix every issue before launching.

Step 4: Link Merchant Center to Google Ads

In Merchant Center, find the linked accounts or apps area, send a link request to the Google Ads customer ID, and approve it in Google Ads.

Step 5: Create the Campaign

1. In Google Ads, create a new campaign with the Sales objective.
2. Choose Shopping for Standard Shopping, or Performance Max to use the feed across more channels, explained in Performance Max.
3. Select the Merchant Center account and the country of sale, India.
4. Bidding: Start with Maximize clicks or Maximize conversion value. Move to a ROAS target once there are steady sales, as covered in Smart Bidding.
5. Budget: Set a daily budget you can sustain for several weeks of learning.

Step 6: Split Products by Value

Create product groups by category or custom label, such as "loafers", "sandals" and "formal". Custom labels are extra columns in the feed that only you see, and they let you group products by anything useful, such as margin band, season or best sellers. Give more budget to high-margin groups, using a custom label for margin and your break-even ROAS per product.

Step 7: Review Weekly

The first few weeks teach you which products and searches actually sell, so set aside time every week to read the reports rather than only checking total revenue.

• Searches: Add negatives such as "repair", "second hand" and "wholesale".
• Products: Find products with many clicks but no sales, then check price, photos and reviews on the page.
• Health: Recheck diagnostics after every sale or price change.

Common Mistakes

• Mismatches: Feed prices or stock that differ from the site are the most common cause of disapprovals.
• Titles: A title like "Loafer 102" gives Google nothing to match searches with.
• Identifiers: Made-up GTINs can get products or the account suspended.
• Images: Text, badges or watermarks on product photos break image rules.
• Grouping: A single product group lets cheap, low-margin items take most of the budget.
• Values: Without order value, bidding cannot tell a Rs 999 sandal from a Rs 4,999 shoe.

Next Steps

• Quality: Improve titles and attributes in bulk with product feed optimization with AI.
• Profit: Work out profitable targets per product using break-even ROAS.
• Growth: Read D2C marketing in India for how Shopping fits a wider plan.

How AI Changes Google Shopping Ads

What AI Automates Now

Google's AI matches searches to products using the feed, sets bids, and can suggest better titles or generate product images with new backgrounds. Merchant Center also offers AI tools for product content in some regions. General AI tools can rewrite hundreds of titles from a spreadsheet in minutes.

What Still Needs a Human

Someone must check that every size, material and price in the rewritten titles is true, choose which products deserve budget, and keep the website and feed in sync. AI can write "genuine leather" into a title for a product that is not.

Risk to Watch

AI-edited images can change how a product looks, such as the colour of the leather. That leads to returns, unhappy customers and possible policy problems. Keep the original product photo as the main image and review any generated image before use.

Do It with AI

Use this prompt to rewrite product titles for the feed. It works in ChatGPT, Claude or Gemini.

1. Export the products from Merchant Center or the store as a sheet.
2. Run the prompt in batches of 50 to 100 products.
3. Check every new title against the product page and the physical product.
4. Upload the changes through a supplemental feed or the store, then recheck diagnostics.

Check Before You Use It

• Facts: Material, size and colour in every title must match the real product.
• Brand fit: Keep the brand name and product naming style consistent across the catalogue.
• Compliance: Follow Google Shopping policies on misrepresentation and image rules, and Indian e-commerce rules on showing the country of origin and seller details.