How to Create a Lookalike Audience in Google Ads?

Alexandre Airvault
January 30, 2025
Creating a lookalike audience in Google Ads can significantly enhance your marketing campaigns by targeting users similar to your existing customers. This guide will explain what a lookalike audience is, why it's essential for your ads, and provide a step-by-step process on setting up your first lookalike audience. By following these instructions, you'll be able to expand your reach and improve the effectiveness of your advertising efforts.

Step-by-Step Guide: Setting Up Your First Lookalike Audience in Google Ads

Step 1: Accessing Audience Features

  1. Log into your Google Ads account.
  2. In the navigation menu, click on "Audiences" under the "Shared Library" section.

Step 2: Creating a New Audience

  1. On the Audiences page, click the blue "+" button to create a new audience.
  2. From the dropdown menu, select "Browse."

Step 3: Selecting Audience Type

  1. In the "Browse" tab, locate the "Lookalike" audience type.
  2. Click "Lookalike" to proceed with creating a lookalike audience.

Lookalike audiences allow you to reach new people who share similar characteristics to your existing customers or website visitors.

Step 4: Defining the Source Audience

  1. Choose the source audience for your lookalike. This can be an existing remarketing list, customer list, or other data source.
  2. For example, select a remarketing list of users who made a purchase on your website in the last 30 days.
  3. Click "Select" to confirm your source audience choice.

Step 5: Adjusting Similarity and Precision

  1. Adjust the similarity level using the slider. Similarity ranges from 1% to 10%, with 1% being the closest match to your source audience.
  2. A higher percentage will result in a larger audience size but less precise matching, while a lower percentage will yield a smaller but more closely matched audience.
  3. For instance, selecting 1% similarity will create an audience that most closely resembles your source audience, but the reach may be limited.

Step 6: Setting Targeting Parameters

  1. Configure the location and language settings for your lookalike audience.
  2. Choose the countries or regions where you want to find similar users.
  3. Specify the language preferences to ensure your ads are shown to users who speak the same language as your source audience.

Step 7: Naming and Saving the Audience

  1. Give your lookalike audience a descriptive name, such as "1% Lookalike - Past 30 Day Purchasers."
  2. Click "Create" to save your newly created lookalike audience.

Step 8: Utilization in Campaigns

  1. To use your lookalike audience, navigate to the ad group or campaign where you want to apply it.
  2. In the Audiences section, click the blue "+" button and select your newly created lookalike audience from the list.
  3. Set the targeting option (Observation or Targeting) based on your goals and click "Save."

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Expanding Your Reach: A Closer Look at Lookalike Audiences in Google Ads

1. Benefits of Lookalike Audiences

Lookalike audiences offer several key advantages for advertisers:

  • Reaching new, interested users: By targeting users similar to your existing customers, you can expand your reach to people more likely to engage with your brand.
  • Enhancing ad campaign effectiveness: Lookalike audiences help you focus your ad spend on users with a higher potential for conversion, improving overall campaign performance.
  • Increasing conversions and ROI: With more precisely targeted ads, you can drive more conversions and achieve a better return on investment for your advertising budget.

2. Audience Creation Steps Recap

Before diving into optimization strategies, let's review the basic steps for creating a lookalike audience:

  1. Access the "Audience manager" in your Google Ads account.
  2. Select an existing audience list to serve as the base for your lookalike audience, such as customer email lists, website visitors, or converters.

3. Audience Analysis and Creation

Once you've selected your base audience, Google Ads analyzes the common characteristics and behaviors of the users in that list. This may include factors like demographics, interests, browsing behavior, and more.

Based on this analysis, Google Ads creates a new lookalike audience consisting of users who share similar traits to your base audience. This allows you to reach potential customers who are likely to be interested in your products or services.

4. Strategy for Audience Expansion

To effectively expand your reach using lookalike audiences:

  • Incorporate lookalike audiences into your overall targeting strategy alongside other targeting methods like keywords, demographics, and interests.
  • Create separate ad groups or campaigns specifically targeting your lookalike audiences to tailor your messaging and track performance more easily.
  • Monitor the performance of your lookalike audience campaigns closely, and adjust bids, budgets, and ad creatives as needed to optimize results.

Optimizing Your Lookalike Audiences: Best Practices and Advanced Strategies

1. Maintaining Source Audiences

To ensure your lookalike audiences remain effective over time, it's crucial to regularly update and maintain the source audience lists they're based on.

As your customer base grows and changes, refreshing your source lists ensures that your lookalike audiences continue to reflect your most valuable users. Aim to update these lists at least once a month, or more frequently if you have a rapidly growing or changing customer base.

2. Experimenting with Different Bases

Not all source audiences are created equal. To find the most effective base for your lookalike audiences, experiment with creating lookalikes from different source lists, such as:

  • Website visitors who spent the most time on your site
  • Customers with the highest lifetime value
  • Users who converted on specific high-value pages or offers

3. Audience Segmentation

To further refine your targeting, consider creating multiple lookalike audiences with varying levels of similarity to your source list. For example:

  • A 1% lookalike audience, which includes users most closely matching your base
  • A 5% lookalike audience, which expands your reach while still maintaining a high level of similarity
  • A 10% lookalike audience, which provides the broadest reach but may have a lower degree of similarity

4. Campaign Monitoring and Adjustment

As with any Google Ads campaign, monitoring the performance of your lookalike audience campaigns is essential for ongoing optimization. Key metrics to track include:

  • Click-through rate (CTR)
  • Conversion rate
  • Cost per conversion
  • Return on ad spend (ROAS)

5. Continuous Improvement and Scaling

As you optimize your lookalike audience campaigns and identify top-performing segments, look for opportunities to scale your success. This may involve:

  • Increasing budgets for high-performing lookalike audience campaigns
  • Expanding your reach by creating additional lookalike audiences based on your most successful segments
  • Continuously testing and refining your ad creatives and landing pages to improve conversion rates