How to Use Facebook Lookalike Audiences

Facebook Lookalike Audiences are a powerful tool for marketers seeking to expand their reach and target new customers. By leveraging the data of your existing audience, including customer profiles and behavior, Facebook can help you find similar users who are likely to be interested in your products or services.
In this blog post, we’ll explore how to use Facebook Lookalike Audiences effectively, from creating custom audiences to optimizing your targeting and measuring results.
Unlock the potential of this invaluable advertising feature and watch your business grow.

Facebook Lookalike Audiences
Facebook Lookalike Audiences

What is a Facebook Lookalike Audience?

A Facebook Lookalike Audience is a powerful targeting option that allows advertisers to reach new people who are similar to their existing customer base.
This feature utilizes the vast amount of data that Facebook has on its users to create an audience that shares similar characteristics, interests, and behaviors with the advertiser’s current customers.

By creating a Lookalike Audience, advertisers can expand their reach and target individuals who are more likely to be interested in their products or services.
This can result in higher engagement, increased conversions, and improved return on ad spend.

The Benefits of Facebook Lookalike Audiences

Facebook Lookalike Audiences offer several advantages that make them a valuable tool for digital advertisers. Here are some key benefits of using Lookalike Audiences:

  • Easier to find high-quality leads: Lookalike Audiences enable you to reach new prospects who share similar characteristics with your top customers. Targeting these individuals increases your chances of getting customers who are interested in your products or services.
  • More value on ad spend: With Lookalike Audiences, you can test multiple audiences simultaneously without the need to create separate campaigns. This allows you to experiment and optimize your ad performance without spending excessive amounts of money.
  • Saves time: Creating Lookalike Audiences is a time-saving process since you can leverage your existing Custom Audiences as the basis for creating new target audiences. This eliminates the need for additional work on your end and streamlines the audience creation process.
  • Higher engagement rates: People in Lookalike Audiences are more likely to engage with your content compared to the general public. This increased engagement can lead to higher click-through rates, conversions, and overall campaign success.

How to Create a Facebook Lookalike Audience

Before you can create a Facebook Lookalike Audience, you need to start with a Custom Audience. This is a group of people who have already engaged with your brand in some way, such as website visitors, app users, or email subscribers.
Once you have a Custom Audience, you can use it as a source to create your Lookalike Audience.

Here’s a step-by-step guide on how to do it:

Step 1: Prepare Your Custom Audience

To create a Custom Audience, you first need to gather the necessary data. This can be done by creating a CSV or TXT file with customer information or by installing a tracking pixel on your website to capture visitor data. Make sure that your Custom Audience contains at least 100 people from the same country to meet Facebook’s requirements.

Step 2: Access the Ad Manager

Once you have your Custom Audience ready, log in to your Facebook Ad Manager account. From there, navigate to the “Audiences” section.

Step 3: Choose a Custom Audience Source

In the “Audiences” section, select the type of Custom Audience source that matches your data. Facebook offers various options, including website, app activity, catalog, customer list, and offline activity. Choose the source that aligns with the data you have prepared.

Step 4: Create Your Custom Audience

Follow the instructions provided by Facebook to create your Custom Audience based on the source you selected. This may involve uploading your customer list, connecting your app, or integrating with your website.

Step 5: Create a Lookalike Audience

Once your Custom Audience is established, you can proceed to construct a Lookalike Audience. Choose the “Create a Lookalike Audience” option in Ad Manager.

Step 6: Choose Your Source

In the Lookalike Audience creation process, you will be prompted to choose a source for your audience. This will be the Custom Audience you created in the previous steps. You can also create a new source if needed.

Step 7: Select Countries or Regions

Next, select the countries or regions where you want to find people who are similar to your source audience. This will determine the geographical scope of your Lookalike Audience.

Step 8: Determine Audience Size

Facebook allows you to adjust the size of your Lookalike Audience using a sliding scale. Smaller numbers indicate a higher similarity to your source audience, while larger numbers offer a broader reach. Keep in mind that Facebook recommends a source audience of 1,000 to 5,000 people for optimal results.

Step 9: Create Your Audience

After selecting your desired audience size, click on the “Create Audience” button to finalize the process. It may take some time for your Lookalike Audience to be created, so be patient.

Tips for Optimizing Facebook Lookalike Audiences

Optimizing Facebook Lookalike Audiences can significantly enhance the effectiveness of your ad campaigns. Here are seven tips to help you achieve this:

1. Use High-Quality Source Data

Ensure that the source audience you use to create the lookalike audience is of high quality. This can include your existing customer base, website visitors, or engaged social media followers.

2. Segment Your Source Audience

Segment your source audience based on specific criteria such as purchasing behavior, demographics, or engagement. This allows you to create more targeted lookalike audiences, increasing the relevance of your ads.

3. Choose the Right Lookalike Audience Size

Start with a smaller audience size (1-2%) for a highly targeted approach, or opt for a larger size (5-10%) for a broader reach. Test different sizes to see which performs best for your objectives.

4. Refine with Exclusion Targeting

Refine your lookalike audience by using exclusion targeting. Exclude people who have already converted or taken the desired action to avoid showing ads to those who are less likely to engage further.

5. Regularly Update Your Lookalike Audiences

Keep your lookalike audiences updated by refreshing the source data periodically. This ensures that your lookalike audience remains relevant and reflective of any changes in your customer base.

6. Utilize Custom Parameters

Utilize custom parameters such as engagement with specific content, time since last purchase, or frequency of purchases to create more nuanced lookalike audiences that align with your campaign goals.

7. Monitor and Adjust

Regularly monitor the performance of your lookalike audiences and make adjustments based on the insights gained. This could involve tweaking audience size, refining source data, or testing different segmentation strategies.

By applying these tips, you can optimize your Facebook Lookalike Audiences to maximize the impact of your ad campaigns and effectively reach potential customers who are similar to your existing audience.


How to create a lookalike audience on Facebook?

To create a lookalike audience on Facebook, go to Ads Manager, select Audiences, click Create Audience, and choose Lookalike Audience. Then, select a source audience, define the location and audience size, and click Create Audience to complete the process.

What is the difference between a custom audience and a lookalike audience? 

A custom audience on Facebook comprises specific users you select, like existing customers. On the other hand, a lookalike audience is generated by Facebook to mirror your custom audience, targeting users with similar traits and behaviors.

How many people do you need for a lookalike audience?

To create a Facebook Lookalike Audience, you need a source audience with at least 100 people from a single country, preferably between 1,000 to 5,000 people, for optimal results.

How long does it take for a Lookalike Audience to populate?

It takes between six and 24 hours for a Facebook Lookalike Audience to populate. Once created, it will refresh every 3-7 days while being targeted in ads. For larger audiences, the population process may take up to 48 hours.


Facebook Lookalike Audiences are a powerful tool for amplifying the reach of your advertising campaigns. By targeting people who share characteristics with your existing customers, you can increase the effectiveness of your ads and drive better results.

Remember to choose high-quality sources, conduct A/B testing, and leverage additional targeting parameters to optimize the performance of your Lookalike Audiences.
With the right strategies and tools, you can harness the power of Facebook Lookalike Audiences to connect with your best customers and grow your business.

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