About The Author
Brian Dordevic
Founder of Alpha Efficiency
From $4/hour virtual assistant to running a leading Chicago web design agency. I will help you occupy the minds of your ideal customers, improve your aesthetics, and increase sales.
Targeting expansion is a feature of Google Ads that tries to resemble the “similar audiences” feature from Facebook. Google Ads uses a pay-per-click (PPC) pricing model for online advertisers to display brief advertisements, service offerings, product listings, and videos. It can place ads in the results of its search engine (Google Search) as well as on non-search focused pages such as those on mobile apps and videos. Experienced PPC marketers use Google Ads as one of their main channels to get new leads and increase revenue. However many advertisers fall prey to Google’s algorithmic targeting expansion, especially if they are a small to medium business.
Table of content
The Google Ads system uses cookies and keywords that are pre-determined by advertisers to place an ad copy where they know they will be relevant. Each time a user diverts their browsing by clicking on an advertising copy, Google generates income which is defined by the keyword the advertiser bids on and an overall Google Ads Quality Score carried by the ad.

Every second 2.3 million users are browsing Google and the majority of search result pages include Google Ads. This shows that Google Ads can be a very effective way of driving relevant, qualified traffic to your website when people are searching for the types of products or services that your business has to offer.
One of the bigger advantages of the Google Ads platform is its enormous reach. Google holds 90% of the search market and processes over 3.5 billion searches a day. It’s the perfect avenue to build awareness for your brand and business.
This is extremely important if you are a small business running a low-budget Google Ads campaign. Indeed, studies show that 45% of small businesses use PPC advertising. The PPC platform offers excellent flexibility in terms of the control it gives you over where your budget goes. You can continually change parameters to satisfy your needs. For example, if your strategy focuses on clicks, then this is the only thing you have to pay for, and all the brand awareness and recognition comes for free. If you do your optimization right, your Google Ads budget can be equally effective no matter how big or small your business is.
The targeting expansion option is one of the most efficient ways to get better performance from Google Display Ads by automatically expanding your targeting reach. This allows Google to find more high-value traffic that can help you drive conversions more efficiently. It offers better forecasting and control which makes it easy for you to predict the performance of your ads. If you use the default setting, automatic targeting will expand the reach of your Google Display ads to more relevant customers. By maximizing your settings, your reach will increase and give you more control over how widely your Display ads are served. This option is very similar to Google’s lookalike audience with one key difference – the lookalike audience is based on the list of people who have already expressed an interest in your business by visiting your site, or giving you their email address while Targeting Expansion is based on interests. No one outside of Google knows how Google determines which interests are a good fit for your ads. We can only assume that they evaluate the interests of people who interact with your ads along with those of other similar businesses in your industry and change your targeting to focus on the mix of these interests.
Most PPC marketers begin their Display campaigns by enabling automatic targeting and setting it to the least amount of expansion. However, if you want to focus on reach or performance, you can maximize both by increasing the reach setting to the maximum. Marketers use this option by increasing the rate of expansion, which ultimately increases your targeting to bring more potential customers. They also check their weekly reach estimates based on their settings, which reflect the additional traffic inventory available as well as the potential impressions.
This expansion works across most display targeting tactics, such as:
Although automatic targeting is available for all Display ad groups, it is not yet possible for specific targeting types such as Demographics and Placement.
Using the targeting expansion option on Google Ads seems like a good way to reach more people with your ads. In theory, all you need to do is click a button, and Google will expand its targeting to reach a bigger audience. Targeting expansion allows Google to add or remove interests to reach more people who may convert, but wouldn’t otherwise have been in your targeting audience, increasing the number of conversions at a lower cost per conversion. With this setting enabled, Google takes a portion of your existing budget and splits it between your selected audience and your broader audience. During the campaign, they will shift the budget to the audience that is getting better results at a lower cost.
To use Google ads targeting expansion, go to your ad set and select Audiences. Find the Detailed Targeting section and check the box next to the “Expand Detailed Targeting” option. Keep in mind that new audiences are opted in by default when it comes to Conversions and App Install campaigns.
The default setting offers limited expansion. If you wish to increase your reach at the same target ROI, you need to choose the highest level of automation by following these steps:
If you wish to review the performance of your automatic targeted ads, you can do so by clicking on Display campaigns in the left-hand navigation menu or click into the campaign or ad group for which you would like to review performance and scroll to the summary rows at the bottom. “Display automatic targeting” row contains all traffic from automatic targeting.
If you have different ad groups using different kinds of targeting, you may wish to compare the results of their performance. To do so, select Display campaigns in the left-hand navigation menu and Ad groups on the page menu. Here you can find data on clicks, impressions, and conversions by ad group.
As we have already said, Automatic targeting helps you optimize your targeting across the Display Network letting you reach people your targeting wouldn’t otherwise reach, at around the same cost. This option is available as “conservative” or “aggressive”. When it comes to retargeting, Google states that ads will be served to other users who are interested in similar products. Now, let’s review the performance and see if this setting works.
If you want to review the automatic targeting performance before disabling it, go to the Audience tab for your desired group. At the bottom, with the performance summary data, you can see a line for Automatic Targeting. As you can probably deduct, this kind of approach generates little to no conversions, despite the money spent on the campaign, so it follows that it would be in your best interest to disable it.
Now let’s make sure that this setting is toggled off for all of your existing Display campaigns. Since this setting is present at the campaign set up, you will have to review each group individually.
Although the Targeting Expansion Option has probably helped some businesses pump up the results they were seeing, we at the Chicago digital marketing agency have had quite the opposite experience. We gave the expand targeting option a try and saw bad results with our normal campaigns outperforming the expanded interest campaigns.
As an experienced PPC agency from Chicago, we would like to share a piece of advice with all of you running low-budget Google Ads campaigns – don’t waste your time and money with underperforming campaigns as Google advertising costs continue to get more and more expensive. The option of Targeting Expansion may show to be useful for businesses that can dedicate a high budget and pay a higher cost, to begin with, while focusing on the long term CPA, but it’s not for everyone.
Recent Post
Brian Dordevic
The $100B SEO: Advanced Keyword Research Techniques for 2026
READ MORE
Brian Dordevic
Your Review Strategy Is a Ticking Time Bomb
READ MORE
Brian Dordevic
The 61% Collapse: How AI Overviews Broke Google’s Click Economy
READ MORE