Google Shopping Ads Keywords: How to Research and Optimize Them

To get better results from Google Shopping Ads, you need to research keywords through your Search Terms Report in Google Ads, competitor product pages, Google Keyword Planner, and Google Trends then apply those keywords directly to your product titles, descriptions, and attributes.

Unlike traditional search ads, Google Shopping does not let you bid on keywords directly. Instead, Google matches your product data to relevant search queries. That means keyword research shapes your product feed, not your campaign bidding settings.

This guide covers how to find the best-performing keywords for Google Shopping, how to apply them, and how to optimize your campaigns for better conversions.

Why Google Shopping Ads Keyword Research Works Differently

Google Shopping does not use keyword targeting the way standard search campaigns do. You cannot add a keyword list and tell Google exactly when to show your ads. Instead, Google reads your product, feeds your titles, descriptions, product types, and attributes and decides which searches are relevant.

This makes keyword research for Shopping Ads fundamentally about product data optimization. The keywords you research should inform what goes into your product titles and descriptions, not a keyword targeting tab in your campaign settings.

Businesses that use Shopping Ads effectively see significant lifts in online sales but the difference usually comes down to how well the product feed matches what shoppers actually search for.

How to Research Keywords for Google Shopping Ads

1. Analyze Competitor Product Pages

Competitor analysis is one of the most direct ways to find relevant keywords for Google Shopping. When a competitor’s product appears for a search term you want, their product title, description, and category structure almost always contain that term.

To research competitor keywords for Google Shopping:

• Product pages and category names: Check the titles and meta descriptions of top-ranking competitor listings. These often reveal the exact phrases Google responds to.
• Product attributes: Note how competitors use size, color, material, and model number in titles. These attributes frequently match long-tail shopping queries.
• Customer language: Read product reviews and Q&A sections on competitor listings. Customers describe products in the same terms they search for them.
• Google Shopping results directly: Search your target product in Google and study the titles of ads that appear. Those titles are the strongest signal of what works.

Long-tail keywords like “waterproof running shoes for women size 8” convert better than broad terms like “running shoes” but broad terms generate far more impressions. A strong product feed targets both.

2. Use the Google Ads Search Terms Report

Your Search Terms Report shows exactly what users typed before clicking your Shopping Ad. This is the most accurate source of performing keywords because it reflects real purchase intent from real shoppers on your campaigns.

To access it: go to Google Ads, open your Shopping campaign, and click the Search Terms tab under Keywords.

Sort by conversions first, then by clicks. Look for:

• Terms with conversions: These are your proven performers. Use them in product titles for similar items.
• Terms with clicks but no conversions: Evaluate whether the product page matches the intent. If not, consider adding these as negative keywords.
• High-impression, zero-click terms: These indicate your product is being shown but the title or image is not compelling enough to earn the click.

If you run multiple Shopping campaigns, review the Search Terms Report across all of them together to identify consistent patterns.

3. Separate Generic Keywords from Product-Specific Keywords

Google Shopping keyword research works best when you treat two keyword categories differently.

Generic keywords are broad category-level terms like “running shoes” or “office desk.” They generate high impressions and attract shoppers who are browsing rather than ready to buy. These are valuable for reach and for pulling in early-stage buyers.

Product-specific keywords target shoppers who know exactly what they want: “waterproof Nike running shoes women size 8” or “adjustable standing desk 60 inch black.” These convert at a higher rate because the searcher’s intent is closer to purchase.

For your product feed:

• Use generic keywords in your category-level product type fields and broader collection titles.
• Use product-specific keywords in individual product titles, descriptions, and Google product type fields.
• Include key attributes color, size, model, material, brand directly in product titles. These details match long-tail search queries that have higher purchase intent.

If you manage a large catalog, optimizing each product title individually is time-consuming. Plugins like CTX Feed can automate product feed generation for WooCommerce stores, applying consistent attribute-based title structures across thousands of products.

4. Use Keyword Research Tools

Several tools provide search volume, competition data, and keyword ideas for Google Shopping campaigns:

• Google Keyword Planner: A free tool inside Google Ads that shows search volumes and competition levels. It is designed for text ads but gives useful volume data for Shopping feed optimization.
• Google Trends: Shows how keyword popularity changes over time and by region. Useful for identifying seasonal demand spikes and planning product title updates ahead of peak periods.
• SEMrush and Ahrefs: Paid tools that show competitor keyword rankings, search volume, and keyword difficulty. Both are useful for uncovering product-level keywords your competitors rank for but your feed does not yet target.
• Search Terms Report (Google Ads): The most direct and accurate source real queries from real shoppers who saw your ads. Prioritize this data above all third-party tools.

How to Add Keywords to Google Shopping Ads

Google Shopping does not have a keyword input field the way Search campaigns do. You add and optimize keywords by updating your product feed data specifically your product titles, descriptions, Google product type, and custom labels.

Here is where to place keywords in your Shopping product data:

• Product title: The most important field. Place your primary keyword near the beginning. Include attributes like brand, size, color, and model. For example: “Nike Air Zoom Pegasus 40 Women’s Running Shoes – Grey/Blue, Size 8.”
• Product description: Add one or two secondary keywords naturally. Focus on the most useful features and benefits. Avoid keyword stuffing.
• Google product type: Use your researched keywords here to help Google categorize your product accurately.
• Custom labels: Use these to group products by keyword theme, season, or performance tier for campaign segmentation.

To add or update these fields in Google Merchant Center, go to your product feed and edit the relevant attributes. If you use a feed plugin, update the title and description templates to include the keyword patterns your research identified.

How to Optimize Keywords in Google Shopping Ads

Match Keywords to Search Intent

Not all searches signal the same intent. A user searching for “running shoes” is likely browsing. A user searching “women’s trail running shoes under $100” is close to buying. Your product titles and descriptions should address both but prioritize the specific, purchase-intent queries in your top-performing product titles.

Before building your campaign structure, map your top keyword categories to search intent stages. This helps you write product titles that capture both broad impressions and specific, converting clicks.

Prioritize High-Converting Keywords Over High-Volume Keywords

High search volume does not equal high conversion rate. Long-tail, product-specific keywords typically convert better than generic category terms, even though they generate fewer impressions.

Use your Search Terms Report to identify which specific queries are generating sales. Give those terms priority placement in product titles. Broad, generic terms can stay in product type fields and descriptions, where they help with reach without diluting your title’s conversion focus.

Use Negative Keywords to Filter Low-Intent Traffic

Negative keywords prevent your Shopping Ads from appearing for searches that are unlikely to convert. This reduces wasted spend on clicks that do not lead to sales.

Common negative keyword scenarios:

• Selling new products only: Add “used,” “secondhand,” and “refurbished” as negatives.
• Selling premium products: Add “cheap,” “free,” and “discount” as negatives if your price point doesn’t compete at that level.
• Brand-specific inventory: If a non-stocking brand triggers your ads and does not convert, add it as a negative at the campaign or ad group level.

Be careful when adding negatives based on conversion data alone. A keyword that did not convert last month may convert next month if the product price, image, or title is improved. Focus on excluding terms that are structurally mismatched to your offering, not just terms that underperformed temporarily.

Treat Each Product Category Separately

Avoid applying a single campaign structure across all product categories. Categories with high search volume and broad queries benefit from granular ad group structures one ad group per product ID, where possible so you can control bids and negatives at the product level.

For categories where irrelevant search terms frequently trigger ads, a granular structure also makes it easier to identify and add negatives without affecting your other categories.

Monitor Search Term Performance and Adjust Regularly

A Google Shopping campaign that worked well last month may perform differently next month as search trends shift. Seasonal events, product launches, and changes in competitor listings all affect which queries trigger your ads.

Check your Search Terms Report weekly. Look for:

• New converting terms to add into product titles
• Terms with rising impressions but no conversions to evaluate as negatives
• Shifts in the wording shoppers use for example, a move from “running shoes for marathons” to “marathon training shoes” signals a change worth updating in your titles

Best Plugin for Google Shopping Feed Optimization

CTX Feed is a WooCommerce product feed plugin that automates feed generation for Google Shopping and over 220 other advertising channels, including Facebook, Instagram, and Bing.

For WooCommerce store owners managing large catalogs, CTX Feed removes the need to manually update product titles and attributes for keyword optimization. You can build template-based title structures that automatically pull product attributes brand, size, color, model into every product title across your entire catalog.

Key Features

• Supports over 220 advertising channels including Google Shopping, Facebook, and Instagram
• Generates multiple feed types for Google Shopping specifically
• Automates attribute mapping so product titles include the keyword-relevant fields Google needs
• Free version available with core feed generation; paid plans extend channel support and automation features (check the official pricing page for current details)
• Designed specifically for WooCommerce stores

Frequently Asked Questions

Key Takeaways

• Google Shopping Ads do not use direct keyword bidding. Google matches search queries to your product feed data, so keyword research must focus on optimizing product titles, descriptions, and attributes.
• The Search Terms Report in Google Ads is your most valuable keyword research source it shows real queries from real shoppers on your actual campaigns.
• Separate generic keywords (for reach) from product-specific keywords (for conversions). Long-tail, attribute-rich product titles convert better and target higher-intent searches.
• Use negative keywords to exclude structurally mismatched queries searches for used products, competing brands you do not stock, or price tiers you do not serve.
• Monitor your Search Terms Report regularly. Seasonal shifts and competitor changes affect which queries trigger your ads, and product titles should be updated to reflect current search patterns.
• For large WooCommerce catalogs, automating product feed generation with a plugin like CTX Feed ensures keyword-optimized title structures are applied consistently across all products without manual effort.