Google Ads Auction Insights and Guide 

Every single time a user carries out a Google search, countless actions are going on behind the scenes. From generating AI Overviews to pulling relevant YouTube videos, this process is designed to provide users with exactly what they’re looking for. 

This includes Google Ads auctions, the process by which Google decides which ads appear for a specific search query and in what order. 

But how do Google Ads auctions work? And how can brands use auction insights, feed management tools and comparative shopping services to increase their visibility and conversions? Join us as we explore everything you need to know about Google Ads Auctions.  

 Key Takeaways

• A Google Ads auction is the automated process Google uses for every search query to determine which shopping ads appear and the specific order in which they are ranked on the SERP. 

• To appear in Google Ads auctions, merchants must maintain a high-quality product feed in Google Merchant Center, ensure landing page relevance, and set competitive bids that reflect their performance goals. 

• Google Ads auction insights are essential reporting metrics that allow you to benchmark your performance against competitors by tracking your impression share, overlap rate, and outranking share. 

 How Do Google Ads Auctions Work?

Google Ads Auctions work by running a series of comparisons of competing bids to determine the order in which the ads will appear for users. However, it’s not just about the amount of money behind a campaign, Google uses various bidding signals to determine which products will show up in front of shoppers.  

When deciding which ad will be present once the user presses search, Google will consider several key attributes to decide its ranking: 

• The bid: Advertisers set the maximum bid they’re willing to pay for a click on their ad. They may end up paying less, but never more.  

• Quality of ad: Google aims to serve users with relevant, helpful content from high-quality brands and advertisers. 

• Landing page: Ads which lead to irrelevant, clickbait landing pages are less likely to succeed in Google Ads auctions. 

• Context: Like all search results, Google Ads are personal to each user. Search term, location and other signals can all influence which ads appear. 

• Competitiveness: For highly competitive keywords, there may be little separating competing advertisers which may make securing the first spot difficult.  

Many of these factors influence your Ad Rank which can have a direct impact on your ability to rank in ads auctions. When CPCs and bids are competitive, these are the factors that can make a difference.  

What are the Google Merchant Center Requirements for Shopping Auctions?

For your ads to appear in Google Ads Auctions, and in front of shoppers, you need to ensure your Google Merchant Center is properly set up and populated with relevant, up-to-date information. This involves sending your product data to Merchant Center to be integrated into a campaign. To create a shopping ad and enter a Google Ads auction, Google Merchant Center requires the following details: 

• Product Title 

• Product Type 

• GTIN (Global Trade Item Number) 

• Images 

• Description 

• Other Key Attributes (e.g. size, colour, material) 

It’s important to note that these are the minimum requirements for Merchant Center and advertisers that provide more detail will stand a better chance of appearing in more searches.  

Certain categories and regions will also have different minimum requirements. For example, clothing items require a defined [size] attribute whereas, other product types may not need this. 

Still not sure where to start? Check out our handy guide covering the essential Google Merchant Center Checklist. 

How does your Product Feed Work with Shopping Auctions?

The easiest way to provide Google Merchant Center, and Google Ads, with this essential information is by uploading your product feed.  

A product feed is a list of every product a company wishes to advertise, alongside the relevant details and attributes for each item. Retailers must provide up-to-date, frequent product feeds to online platforms such as Google Merchant Center to ensure their ads are correct and appearing in Ads auctions.  

How to Easily Manage your Product Feed

Providing consistent, up-to-date product feeds may feel like a daunting task, especially if you’re a large retail site with tens of thousands of products. However, there are tools to make this simpler. Feed management tools, such as FeedManager, allow you to export up-to-date product information to 50+ partners across the internet.  

This gives retailers a major competitive advantage in Google Ads auctions, boosting their Ad Rank which can make all the difference when CPCs are tight. FeedManager doesn’t just provide Google and other platforms with automated product information, it also optimises your product titles, descriptions and attributes. 

Check out our blog to find out more about FeedManager and how to create a product feed that converts. 

 Auction Insights in Google Ads

Feed management tools such as FeedManager aren’t the only way to improve your Google Ads auction performance. Auction insights in Google Ads allow you to compare your performance with competitors who are bidding on similar search terms to you. Auction insights reports provide merchants with 3 different statistics: 

• Overlap Rate 

• Impression Share 

• Outranking Share 

This makes auction insights helpful when it comes to diagnosing performance issues within your campaigns. You can see exactly where you’re succeeding, and where you’re losing ground to your competitors. When auction insights are paired with FeedManager, you can easily optimise your product information to quickly recover lost performance.  

Where are Auction Insights in Google Ads? 

You can find auction insights in Google Ads by heading to the Campaigns menu and selecting either campaigns, Ad groups, or keywords depending on the scope of your report. Then select the campaign or group you wish to focus on.

You can then select auction insights which will take you to the auction insights report. Here you can select either Search, Shopping or Performance Max ad types (for shopping auction insights, select the Shopping ad type).

You can then access your auction insights report and use the filters to delve into the data. 

What is Impression Share in Google Ads Auction Insights?

Impression share is the percentage of eligible auctions where your ad appeared compared to competitors. This allows merchants to also view lost impression share and understand where competitors gained to adjust their campaigns accordingly.  

Do you Need a CSS to use Google Ads Auctions? 

Yes, you need to use a Comparative Shopping Service (CSS) to place Shopping ads and participate in Google Ads auctions. When merchants use a CSS such as Productcaster for their auctions, they can save up to 20% on their CPC costs, avoiding Google’s operating cost for their own CSS and providing merchants with extra bidding power to compete with in auctions.  

Choosing the right CSS will also unlock additional support to help drive efficiency and conversions through expert advice and enhanced access to direct Google support. As the recipient of 2025’s Google CSS Spotlight Award, Productcaster continues to demonstrate that we are unmatched in terms of helping advertisers achieve the best possible results in their Google Ads auctions. 

Ready to learn more? Book a demo today and find out how Productcaster’s award-winning platforms can help your business grow.