.png)
The e-commerce campaigns on the search network are an essential acquisition lever for attracting highly qualified prospects. Unlike a standard text ad, the Shopping format immediately displays decisive information: the visual, the price, and the brand. Users only click if they have a genuine interest in the item, which drastically reduces wasted clicks. However, the success of these campaigns relies on an element that is invisible to the user but vital to the algorithm: optimizing your product feed.
What is a Google Shopping feed?
A product feed is a digital file (often in XML or CSV format) generated by your e-commerce site (Shopify, PrestaShop, WooCommerce). It contains all the detailed characteristics of your catalog. This file is sent to Google Merchant Center, the platform that bridges your online store and the Google Ads advertising network.
If your feed is incomplete or contains errors, Google will refuse to display your products or will show them for irrelevant queries, thereby wasting your budget.
{{audit-primary="/cta"}}
5 pillars for optimizing your product feed data
To dominate search results, it is essential to provide as many attributes as possible. Here are the optimizations that will boost your profitability.
1. Structure your titles scientifically
The title is the attribute that has the most impact on how the algorithm ranks your listing. You have a maximum of 150 characters, but users generally only see the first 70.
Here is how to structure your titles based on your industry:
2. Write highly relevant descriptions
The description helps Google understand the context of your product so it can appear in long-tail search queries. You can use up to 5,000 characters.
However, focus your efforts on the first 160 to 500 characters. Naturally include your secondary keywords, technical specifications, materials, and the most relevant visual aspects of your item.
3. Provide the GTIN (EAN) code to boost visibility
The GTIN (often called EAN in Europe) is the unique barcode provided by the manufacturer. Many e-commerce merchants make the mistake of ignoring it. However, this attribute is a major trust signal for Google.
On average, when the correct GTIN is provided in the feed, we see a 40% increase in click-through rate (CTR) and a 20% increase in conversion rate. It allows Google to compare your offer with your competitors' on very specific queries.
4. Master the "Product Type" and Google Category
Do not confuse these two attributes:
- Google Product Category (GPC): This is a strict taxonomy imposed by Google. If you do not provide it, the algorithm will try to guess it, often with errors.
- Product Type: This is your own categorization, the one used on your website (e.g., Home > Men > Shoes > Sneakers). This is a crucial attribute because it allows you to intelligently filter and structure your Google Ads campaigns.
5. Leverage Custom Labels
Custom Labels are a secret weapon for acquisition experts. You can add up to 5 custom labels (from 0 to 4) to your feed. They are not visible to users, but they allow you to segment your campaigns according to your own business logic.
- Example Custom Label 0: Margin (High / Medium / Low)
- Example Custom Label 1: Seasonality (Winter Sales / Summer Sales)
- Example Custom Label 2: Turnover (Best Sellers / Clearance)
{{rdv-primary="/cta"}}
How can you fix your feed without touching your website?
It is common for data from your CMS to be imperfect (titles in all caps, missing descriptions). Fortunately, you don't need to call a developer for every single change.
In Google Merchant Center, you can use two powerful features:
- Feed rules: These allow you to automate changes (for example: automatically adding the brand name to the beginning of all titles).
- Supplemental feeds: This is a simple Google Sheets file that you connect to your main feed. It allows you to overwrite or add specific data (such as missing GTIN codes or Custom Labels) in a very agile way.
The impact of your feed on Performance Max campaigns
While optimizing feeds has always been important for standard Shopping campaigns, it is now a matter of algorithmic survival. With the widespread adoption of automated Performance Max (PMax)campaigns, Google displays your products across its entire inventory (Search, Display, YouTube, Gmail, Maps).
In a PMax campaign, you no longer choose your keywords. The semantic quality of your feed (titles, descriptions, categories) dictates to the algorithm which queries your ads should appear for. A mediocre feed will inevitably lead to irrelevant ad delivery and wasted advertising budget.
Conclusion
Optimizing a Google Shopping feed should no longer be seen as a mere technical formality for getting a catalog online. Today, it is the absolute strategic foundation of any high-performing e-commerce acquisition strategy. As we have explored, every detail counts: a title structured with the right keywords ensures your visibility, the inclusion of GTIN codes boosts your conversion rates, and the expert use of Custom Labels gives you back control over your commercial profitability.
In the era of Performance Max campaigns, where Google's artificial intelligence has replaced manual bidding and keyword targeting, the richness of your data is what makes the difference between a campaign that drains your budget and one that generates a massive return on investment. It is therefore imperative to clean, enrich, and monitor your feeds daily via Google Merchant Center.
If your catalog contains hundreds or even thousands of items, this meticulous work can quickly become time-consuming and complex. Are you encountering validation errors on your products, noticing a drop in your advertising ROAS, or looking to completely restructure your automated campaigns?
Don't let your competitors capture your sales. Contact the team of experts at Datashake now to audit your feed and unlock the full potential of your e-commerce business.
{{expert-primary="/cta"}}
Frequently Asked Questions (FAQ)
What is a Google Shopping feed?
A Google Shopping feed is a data file (often in XML format) generated by my online store. It contains my complete product inventory along with their specific attributes (title, price, image, stock, barcode). I send this file to Google Merchant Center so that I can display my items as advertisements.
Why is my product disapproved in Google Merchant Center?
If my product is disapproved, it is usually due to a data quality issue. The most common causes are price inconsistencies between my feed and my landing page, missing shipping settings, images containing promotional text, or an invalid or missing GTIN code.
How should I structure my product title?
To optimize my title, I must place the most important information within the first 70 characters. I generally start with my brand name, followed by the product type, model, and finally specific features like gender, color, or size.
Is the GTIN (EAN) code really mandatory for my campaigns?
Yes, for the majority of manufactured products, the GTIN code is strictly mandatory. If I sell existing branded products without providing this code, Google will heavily penalize my reach. By adding it, I can expect to increase my click-through rate by about 40%.
What is the difference between the Google Product Category and the Product Type?
The Google Product Category is a standardized list imposed by Google (I must choose from their nomenclature). The Product Type, on the other hand, is a free-form attribute where I can insert the exact hierarchy of my own website. The latter is crucial for helping me effectively segment my future campaigns in Google Ads.
Can I use images with my logo or promotional text?
No, I must avoid this at all costs. Google requires high-quality images showing the product on a solid background (ideally white). If I add watermarks, my logo, or mentions like "50% off sale," Google's algorithm will automatically reject the image and disapprove my item.
How can I modify my feed data without touching my CMS?
If I don't want to modify my e-commerce site's database (Shopify, PrestaShop), I can use the feed rules tool directly in my Merchant Center interface. I can also connect a supplemental feed via a simple Google Sheets file to correct errors or add new attributes in bulk.
What are Custom Labels used for?
Custom Labels are tags invisible to customers that I add to my feed. They allow me to classify my products according to my own business logic. For example, I can tag my items based on their margin level (high/low) or their seasonality, in order to finely adjust my advertising budget in Google Ads.
What is the impact of my feed on my Performance Max campaigns?
The impact is total. In a Performance Max (PMax) campaign, I don't choose keywords. It is the algorithm that reads and analyzes the words present in my feed (titles and descriptions) to decide if my product matches a user's search. A poorly optimized feed will therefore ruin my PMax performance.
