What is similar audiences?

What is Similar Audiences in Google Ads?

Similar Audiences is a targeting feature in Google Ads that allows advertisers to reach new users who share similar characteristics and behaviors with their existing customers or audience lists. It works by analyzing the profiles, interests, and online behaviors of people on your remarketing or customer match list, and then identifying new people who “look like” them but haven’t interacted with your brand yet.

This audience type helps you expand your reach and find potential new customers who are more likely to be interested in your business — making it ideal for lead generation, e-commerce, app promotion, and brand awareness.

How Similar Audiences Work

1. You create or upload a seed list in Google Ads. This could be:

   • A Customer Match list (emails, phone numbers, etc.)

   • A website remarketing list (visitors who came to your site)

   • A YouTube user list (people who watched your videos)

   • A Gmail list (people who engaged with Gmail ads)

2. Google analyzes that seed audience’s behaviors, interests, and demographics across its platforms.

3. Google then builds a new audience of users who show similar online behavior or interests but haven’t interacted with your brand yet.

4. You can use this similar audience in any campaign — Search, Display, YouTube, Discovery, or Gmail.

Example to Understand

Let’s say you run an online shoe store and have a Customer Match list of 5,000 users who previously bought Puma sneakers from your website.

Google will analyze the behavior of those 5,000 users — including what websites they visit, what videos they watch, what keywords they search — and then create a Similar Audience of new users who behave like those buyers.

You can now show your ads (maybe a new collection of Puma shoes) to this Similar Audience to increase the chances of gaining new customers who are likely to convert.

Where Can You Use Similar Audiences?

1. Search Ads
   Show ads to users with similar behavior when they search for products or services related to yours.

2. Display Ads
   Show banners or image ads on websites and mobile apps to people similar to your website visitors or customers.

3. YouTube Ads
   Run video campaigns targeting users who behave like your subscribers or video viewers.

4. Gmail Ads
   Reach new users in their Gmail inboxes who have interests similar to your existing audience.

5. Discovery Ads
   Expand brand discovery by targeting people on Google Discover who match your audience traits.

Benefits of Using Similar Audiences

1. Reach New Customers
   Attract potential buyers who have never interacted with your brand but are highly relevant.

2. Better Performance
   Since the new audience is similar to your best-performing users, it tends to drive more engagement and conversions.

3. Simple to Use
   Google automatically creates the similar audience; no complex setup required.

4. High Quality Leads
   You target users based on behavior, not just demographics, making the leads more qualified.

5. Expand Lookalike Reach
   Combine with smart bidding and automated creatives for even stronger performance.

Limitations of Similar Audiences

1. Minimum Data Required
   You need a high-quality seed list. Google may not create a similar audience if your list is too small or lacks data.

2. Less Control
   Google doesn’t allow manual adjustment of the similar audience creation process.

3. Phasing Out for Some Channels
   Google is gradually replacing Similar Audiences with optimized targeting and audience expansion in some campaign types due to privacy updates.

Example: Amazon India Using Similar Audiences

Objective: Amazon wants to promote its back-to-school supplies campaign to new parents who haven’t visited the site before.

Seed Audience: Customer Match list of users who bought school bags, stationery, or uniforms last year.

Google Builds: A Similar Audience of users who are:

• Browsing educational sites

• Watching parenting videos on YouTube

• Searching for “best school bags”, “kids stationery”

Ad Placement:

• Display banner showing “Up to 50% Off – Back to School Essentials”

• YouTube bumper ads with animation of kids using Amazon products

• Discovery ads with carousel product images

Result:

• Higher click-through rate (CTR) than broad audience campaigns

• 25% more conversions at 20% lower cost-per-conversion

Best Practices for Similar Audiences

1. Use High-Quality Seed Lists
   Better the list, better the lookalike performance. Try using your top 10% highest-value customers.

2. Segment Your Lists
   Don’t use one big list. Create separate similar audiences based on purchase behavior, product interest, or location.

3. Test and Compare
   Compare similar audiences against in-market or affinity audiences to find the best performers.

4. Combine with Smart Bidding
   Use Target CPA or Maximize Conversions bidding strategy for optimal results.

5. Update Seed Lists Regularly
   Keep your remarketing or customer lists fresh so Google can build accurate and timely similar audiences.

Conclusion

Similar Audiences in Google Ads is a powerful feature that helps advertisers scale their campaigns by targeting new people who behave like their best customers. It combines your existing customer insights with Google’s AI to drive better reach, relevance, and performance. Whether you’re in retail, travel, finance, or education, using Similar Audiences can improve ROI, drive new traffic, and grow your customer base effectively.