Google Ads custom segments are a targeting feature that allows advertisers to reach specific users based on their search history, the websites they visit, and the mobile applications they engage with on their devices. By defining these audience groups yourself, you move beyond the standard demographic or interest-based categories provided by Google. This tool allows you to build a bridge between your brand and users who have shown intent through their digital actions, providing a way to refine your campaign reach in a crowded market.
How do Google Ads custom segments work in practice?
When you build a custom segment, you are telling Google to look for users who match specific behaviors rather than just broad categories. For example, if you sell high-end office furniture, you might input search terms that your ideal customers frequently type into the search bar, such as ‘ergonomic desk chair’ or ‘home office setup ideas.’ Google then identifies users who have recently searched for these terms or interacted with related content across the web. This process is automatic and happens in real-time, ensuring your ads appear to people who are currently displaying interest in the products you provide.
The flexibility of this feature is one of its most useful traits for a campaign manager. You can choose to target people who search for specific keywords, or you can target users who have visited websites similar to your competitors. If you know that your potential customers often visit a particular industry blog or a news portal, you can input that URL into your custom segment. Google will then prioritize showing your ads to people who frequently visit those specific domains, allowing you to intercept traffic from relevant sources.
What are the core components of custom segments?
To build an effective segment, you need to understand the three primary inputs available within the Google Ads audience manager interface. Each input serves a different purpose in your strategy, and you can mix and match them to create a unique audience profile that fits your specific business goals. A typical account setup involves testing different combinations to see which approach yields the most relevant engagement without overspending on broad, low-quality traffic.
- People who searched for any of these terms: Use this to reach users who are actively looking for your product or service via Google Search.
- People who browse types of websites: Use this to reach users who consume content similar to the websites you specify, which is ideal for brand awareness.
- People who use types of apps: Use this to reach users who have installed or interact with mobile applications that are relevant to your industry.
Why should you use custom segments for your campaigns?
One major benefit of using custom segments is the ability to maintain control over your audience reach. In many standard targeting setups, you are limited by the pre-defined categories provided by the platform, which may not align perfectly with your niche. By creating custom segments, you ensure that your budget is spent on individuals who have demonstrated a clear signal of interest. This approach reduces wasted ad spend and helps you reach a more qualified group of people who are likely to interact with your site.
Another reason to use these segments is their effectiveness in competitive markets. If you are a small business owner competing with larger brands, you might not have the budget to bid on generic, expensive keywords. Instead, you can use custom segments to target users who visit your competitors’ websites or search for niche terms that larger brands might overlook. This tactical shift allows you to gain visibility in places where your audience is already spending time, effectively positioning your brand directly in front of the people who matter most.
How Alien Road applies custom segments for clients
At Alien Road, we approach custom segments by focusing on the specific intent signals of the client’s target market. During the initial discovery phase, we gather a list of competitor websites, common industry search terms, and relevant mobile applications. We then organize these into distinct audience segments within the Google Ads panel. This allows us to monitor how each group performs and make data-driven adjustments to the bids or ad creative for those specific users over time.
For example, in a typical engagement for a client in the software space, we might set up one custom segment focusing purely on search terms used by people comparing alternatives. Simultaneously, we might create a second segment targeting visitors of niche industry forums. By splitting these audiences, we can observe which strategy drives more conversions. If one segment performs better, we reallocate the budget toward that group, ensuring the client receives the most value for every dollar spent on their campaigns.
How to set up your first custom segment
Setting up your first segment is a straightforward process that happens entirely within the Google Ads dashboard. You will need to access the ‘Audience Manager’ section, which is typically found under the ‘Tools and Settings’ menu. Once there, you can select the ‘Custom Segments’ tab and click the blue plus button to begin creating your first entry. Give your segment a descriptive name so that you can easily identify its purpose later when you review your performance reports.
- Navigate to Tools & Settings > Shared Library > Audience Manager.
- Click on the Custom Segments tab to view your current list.
- Select the blue plus button to create a new custom audience segment.
- Choose between ‘People who searched for any of these terms’ or ‘People who browse types of websites’.
- Add your list of keywords, URLs, or apps to the input fields.
- Review the estimated audience reach provided by the system.
- Save the segment and apply it to an existing or new campaign.
What are the common pitfalls to avoid?
A common pattern is for new advertisers to make their custom segments too broad, which can lead to diluted results. If you add hundreds of unrelated keywords into a single segment, Google may struggle to identify a specific audience profile, leading to ads being shown to people who are not actually interested in your product. It is better to start with a smaller, highly relevant list of terms or websites and monitor the results before adding more entries to the list.
Another pitfall is forgetting to audit your segments regularly. Digital habits change, and a website that was highly relevant six months ago might not be the best target for your ads today. In a typical account, we check these audience segments on a monthly basis to remove URLs that are no longer driving meaningful traffic or to add new search terms that have surfaced during recent performance analysis. This maintenance ensures that your targeting remains sharp and aligned with your current business goals.
Where to start this week
To start this week, identify three primary competitors and create a custom segment based on their websites. This simple exercise will help you understand how your ads perform when targeted at users who are already familiar with your competition. Once the segment is live, give it at least one week to gather data before you make any changes. Review the impressions and click-through rates, and use those figures to decide whether you should expand the segment or focus your efforts on a different group of users.
If you are struggling to see results, look at your search terms report to find new keywords that you can add to your existing custom segments. This iterative approach is the best way to refine your strategy without needing complex tools. Stay focused on the data, keep your segments clean, and continue to test new combinations until you find the right balance for your brand. By being proactive with your audience settings, you can create a more efficient and profitable campaign structure.
Keep reading: Google Advertising · Advertising