Mergado Audit: Guide to technical product feed inspection#
For successful advertising on comparison shopping engines and ad platforms, your product data needs to be accurate, complete, and valid. The technical state of your feed directly affects product approval, pairing, and campaign performance.
Mergado Audit is a free online tool that shows you the actual condition of your XML or CSV feed within minutes — and tells you exactly what to fix.
1. What is Mergado Audit?#
Mergado Audit is a tool that automatically performs a technical check of your product XML or CSV feed and reveals issues that need attention.
Mergado Audit:
- loads your data file once from a public URL,
- runs a set of tests based on validators,
- evaluates found errors, warnings, and recommendations,
- displays specific solution suggestions.
The Audit works as feed diagnostics. It doesn’t modify data — it only analyzes data quality and compliance with the requirements of the selected advertising channel (e.g. Google or Heureka).
It’s worth noting that the Audit won’t catch every possible issue. It focuses on technical and formal data accuracy based on defined validation rules. It doesn’t evaluate business strategy, price competitiveness, product text quality, or actual campaign performance.
2. What it’s used for#
The main goal of the audit is to detect issues that can:
- cause product rejections,
- limit product visibility in filters,
- hurt pairing with competing offers,
- negatively impact advertising performance.
Practical benefits:
- Detecting critical errors — Find out why comparison engines or advertising systems (e.g. Google or Heureka) may be rejecting your products.
- Checking required parameters — The Audit verifies the presence and correctness of required elements (e.g. price, availability, EAN, URL).
- Data quality analysis — Checks not just whether required elements exist, but whether the data itself is valid. For example, price format, EAN code accuracy, or URL uniqueness.
- Improving filtering and pairing — The Audit checks whether parameters affecting product pairing and better filter visibility are filled in correctly.
- Specific fix recommendations — Results include problem descriptions and fix recommendations (often with links to documentation or video tutorials).
3. How Mergado Audit works#
Mergado Audit is designed to be as simple as possible, even for non-technical users.
Where to run the audit:
- on the standalone page audit.mergado.com
- or directly from the Mergado Editor interface
What you need to start:
- A URL of your XML or CSV feed (publicly accessible)
- An email address to receive the results
How to run the audit:
- Enter the feed URL.
- Select the target format (e.g. Google, Heureka), or let the system detect the format automatically.
→ This step is important because each advertising channel has its own feed structure, required elements, and specific validation rules. The Audit needs to know which rules to check the data against. In other words, a Google feed is evaluated differently than a Heureka feed.
- Enter the email where you want to receive the audit results.
- Click Run audit and the audit performs the check.
Processing time ranges from a few minutes to a maximum of several hours for large feeds (depending on file size and system load).
4. Evaluating the results#
Results are clearly divided into three severity levels:
🔴 Errors (red)
Serious issues that can lead to product rejection or prevent proper processing.
🟡 Warnings (yellow)
Issues that don’t directly block advertising but may reduce performance or data quality.
🟢 Recommendations (green)
Tips for further feed optimization and improved competitiveness and advertising performance.
5. Pricing, limits, and availability#
- Price: Mergado Audit is free.
- Registration: No Mergado registration required.
- Repeat usage: The Audit can be run repeatedly without any limits.
- Recommended frequency: At least once a month (ideally after major feed changes).
- Maximum feed size: The current limit is 256 MB. If you need to check a feed that exceeds this limit, you’ll find instructions in the article What to do when your feed for Audit exceeds 256 MB.
- Results availability: Results are available online for 10 days.
6. Who is Mergado Audit suitable for?#
- Online stores that want to quickly check feed quality.
- PPC specialists when taking over a new account.
- Agencies as initial project diagnostics.
- Companies that want to detect technical issues without a developer.
7. Specialized audits#
In addition to the basic product feed audit, Mergado also offers specialized tools focused on checking specific e-commerce areas. All specialized audits are free.
- Image audit (audit-obrazku.cz):
The image audit checks the technical parameters of product photos, such as resolution, background, format, or URL availability. It helps prevent image rejection in advertising systems.
- Bidding audit (bidding-audit.cz):
The bidding audit focuses on the state of your assortment in bidding campaigns on Heureka. It evaluates competitiveness, pairing, and strategy efficiency.
- Pricing audit (pricing-audit.cz):
The pricing audit reveals pricing issues on Heureka, compares your prices with competitors, and helps identify unpaired products or offers with zero or extreme prices.
Summary#
Mergado Audit is a free tool for technical inspection of XML and CSV feeds that helps quickly detect issues in product data. It flags errors affecting product approval, pairing, and visibility in advertising systems, and provides clear recommendations for fixes.
However, it’s important to see it as a diagnostic tool primarily focused on data quality — not as a comprehensive marketing or strategic analysis. It delivers the most value when its outputs lead to further work on campaigns, pricing, or assortment.
If you want to be sure your advertising stands on solid data, regular feed checks should be a natural part of your e-commerce routine.
FAQ#
What is Mergado Audit?#
Mergado Audit is a free online tool for technical inspection of product XML and CSV feeds. It automatically analyzes data quality and flags errors, warnings, and recommendations based on the rules of the selected advertising channel (e.g. Google or Heureka). It also recommends specific solutions.
Is Mergado Audit free?#
Yes. Using Mergado Audit is completely free.
Do I need a Mergado account to run the Audit?#
No. No Mergado registration is required to run the audit. You can launch it on the standalone page audit.mergado.com.
Does the Audit modify data in my feed?#
No. The Audit only analyzes data and evaluates its quality. It doesn’t make any changes to the feed.
Why should I even audit my feed?#
The state of your feed affects product approval, display in filters, pairing with competing offers, and overall advertising performance. The Audit helps detect issues that can slow down or block your advertising.
What errors does the Audit detect?#
The Audit checks the feed according to the rules of the specific target platform the data is intended for (e.g. Google or Heureka). Each advertising channel has its own feed structure requirements, required elements, and value formats. The Audit evaluates data based on these rules.
It detects, for example, missing required elements (price, availability, EAN, URL, etc.), invalid price format, invalid EAN codes, duplicate or broken URLs, feed structural errors, or data non-compliance with the selected platform’s requirements.
Does the Audit also check data quality, or just presence?#
It checks both. It monitors not only whether an element exists, but also whether its value is valid and properly formatted.
Can the Audit help improve product pairing?#
Yes. Checking correctly filled parameters can significantly improve pairing and product visibility in filters.
How do I launch Mergado Audit?#
- Go to audit.mergado.com.
- Enter your feed URL.
- Select the target format or let the system detect it automatically.
- Enter an email for the results.
- Click “Run audit.”
Why do I need to select a target format?#
Each advertising channel has its own feed structure and validation rules. The Audit needs to know which rules to evaluate the data against. A Google feed is checked differently than a Heureka feed.
What do I need to run the audit?#
- A publicly accessible URL of an XML or CSV feed.
- An email address for the results.
How long does the check take?#
Usually a few minutes. For large feeds, processing may take longer (up to several hours), depending on file size and system load.
Can I run the audit multiple times?#
Yes. The Audit can be run repeatedly without any limits.
How often should I run the audit?#
We recommend at least once a month, ideally after every major feed or online store update.
What do audit results look like?#
Results are divided into three levels:
🔴 Errors — Serious issues that can cause product rejection. 🟡 Warnings — Issues that may reduce advertising performance. 🟢 Recommendations — Tips for further optimization.
How long are results available?#
Results are available online for 10 days.
Do results include fix instructions?#
Yes. Each found issue includes a description and recommended solution. Links to documentation or video tutorials are often included.
What is the maximum feed size for auditing?#
The maximum file size is 256 MB.
What if my feed is larger than the Audit limit?#
You need to split the feed. Follow the instructions in the article “What to do when your feed for Audit exceeds 256 MB”.
Does the Audit support both XML and CSV feeds?#
Yes, it supports both formats.
Is the Audit suitable for beginners?#
Yes. The tool is designed so even non-technical users can handle it.
Can agencies and PPC specialists use the Audit?#
Yes. The Audit is suitable as initial diagnostics when taking over a new project.
Do I need a developer to fix errors?#
Not always. Many errors can be fixed using feed editing tools (e.g. in Mergado Editor). For fundamental structural issues, developer involvement may be necessary.
Are there other audit types besides the basic feed audit?#
Yes. Mergado also offers specialized audits — image audit, pricing audit, and bidding audit.
What is the Image Audit?#
A tool that checks the technical parameters of product photos (resolution, format, URL availability, background). It helps prevent their rejection in advertising systems.
What is the Bidding Audit?#
It analyzes the state of bidding campaigns on Heureka. It evaluates competitiveness, pairing, and strategy efficiency.
What is the Pricing Audit?#
It focuses on pricing on Heureka. It identifies unpaired products, zero or extreme prices, or price non-competitiveness.
Are the specialized audits free?#
Yes, all audit types are free.
Is the Audit suitable as a regular data quality check?#
Yes. Running the audit regularly helps keep your feed in good shape long-term.