TikTok Custom Audience: How to Target the Right Users

 

In TikTok advertising, creative alone does not guarantee success. Even the most engaging videos can fail if they’re delivered to the wrong people. Effective targeting is the foundation of profitable TikTok campaigns, and Custom Audiences are one of the most powerful tools available.

By reconnecting with users who already interacted with your brand, TikTok Custom Audiences help you reduce wasted spend, improve conversion rates, and scale campaigns with confidence.

This guide explains what TikTok Custom Audiences are, the types available, how to set them up, common mistakes to avoid, and best practices to maximize results.


What Are TikTok Custom Audiences?

A TikTok Custom Audience is a group of users defined by their prior interactions with your brand—on TikTok, your website, or your app. Instead of relying solely on broad demographics or interest targeting, Custom Audiences focus on warm prospects who already know you.

Examples include:

  • Visitors to your website tracked via the TikTok Pixel.

  • People who engaged with your TikTok videos or ads.

  • Customers imported through email or phone number lists.

This approach allows advertisers to run remarketing campaigns—reminding users of products they viewed, abandoned, or engaged with earlier. Since these users already showed intent, campaigns tend to deliver higher CTR, stronger CVR, and lower CPA compared to cold targeting.


Why TikTok Custom Audiences Matter

1. Increase Relevance

TikTok users see thousands of videos daily. Custom Audiences ensure your ads are highly relevant because they target people who already interacted with your brand.

2. Improve Conversion Rates

Remarketing audiences generally convert better. Studies show that retargeting campaigns can lift conversion rates by up to 70% compared to cold audiences.

3. Enable Retargeting and Scaling

Custom Audiences are the foundation for Lookalike Audiences, which allow you to expand reach while maintaining precision.

4. Optimize Ad Spend

By focusing on people most likely to convert, you minimize wasted impressions and achieve stronger ROAS.


Types of TikTok Custom Audiences

TikTok Ads Manager offers multiple sources for building Custom Audiences. Each caters to different stages of the customer journey.

1. Customer File

Upload hashed email addresses, phone numbers, or device IDs from your CRM. This lets TikTok match users to platform profiles and serve ads directly to past customers or leads.

Use case: Reactivate past buyers or upsell to existing customers.

2. Engagement Audiences

Target people who engaged with your TikTok content—viewed, liked, commented, shared, or clicked.

Use case: Retarget video viewers who didn’t convert.

3. App Activity

If you run an app, you can create audiences from in-app behavior (e.g., sign-ups, purchases). Requires TikTok SDK integration.

Use case: Encourage repeat app engagement or purchases.

4. Website Visitors

Built via the TikTok Pixel, these audiences include users who visited specific pages, added items to cart, or triggered other events.

Use case: Retarget abandoned carts with dynamic product ads.

5. Lead Form Engagement

For advertisers using TikTok’s Instant Forms, Custom Audiences can be built from users who opened or submitted forms.

Use case: Re-engage high-intent leads who didn’t finalize a purchase.


How to Set Up TikTok Custom Audiences

Creating Custom Audiences in TikTok Ads Manager is straightforward.

Step 1: Go to Audiences

Log into TikTok Ads Manager → AssetsAudiences.

Step 2: Create a Custom Audience

Click Create AudienceCustom Audience. Choose a source: Customer File, Website Traffic, App Activity, Engagement, or Lead Form.

Step 3: Configure Settings

  • Name: Use descriptive titles (e.g., “Website Visitors – 30 Days”).

  • Retention Window: Up to 180 days.

  • Data Input: Upload lists, select a Pixel, or define engagement events.

Step 4: Processing & Validation

TikTok may take several hours to process. The audience must meet a minimum size before becoming active in campaigns.


Common Mistakes to Avoid

1. Outdated Customer Lists

Low-quality or old email/phone lists reduce match rates. Keep your data fresh.

2. Pixel Misconfiguration

If your TikTok Pixel isn’t firing correctly or key events are missing, website audiences won’t build accurately.

3. Privacy Compliance Gaps

Always follow GDPR or CCPA guidelines when uploading customer data.

4. Audience Overlap

Running ads to overlapping audiences can cause internal competition and inflate costs. Deduplicate where possible.


Best Practices for TikTok Custom Audiences

Keep Data Updated

Refresh customer files and sync CRM systems regularly. Automate where possible.

Segment by Intent

Separate high-intent actions (checkout, add-to-cart) from lower-intent actions (video views). Adjust messaging accordingly.

Use Clear Naming

Organize audiences with descriptive names for easy campaign management.

Combine with Lookalike Audiences

Once Custom Audiences perform well, scale with Lookalikes for broader reach without losing precision.

Test Retention Windows

Shorter retention windows (7–30 days) work best for conversions, while longer windows (90–180 days) are better for nurturing.


Advanced Applications of TikTok Custom Audiences

Dynamic Retargeting

With the TikTok Pixel, advertisers can retarget users with the exact products they viewed, increasing purchase likelihood.

Funnel-Based Segmentation

Build multiple Custom Audiences at each funnel stage (product views, add-to-cart, checkout) to deliver tailored creatives.

Exclusion Audiences

Exclude existing customers from prospecting campaigns to avoid wasting impressions.

Sequential Retargeting

Serve different creatives based on user behavior. For example:

  • Day 1–3: Reminder of product viewed.

  • Day 4–7: Offer discount code.

  • Day 8–14: Showcase testimonials or UGC.


Measuring Success of Custom Audiences

Key Metrics to Track

  • CTR: Are your ads resonating with warm users?

  • CVR: Do retargeted audiences convert at higher rates?

  • CPA/ROAS: Are costs lower compared to cold traffic?

Tools for Analysis

TikTok Ads Manager provides breakdowns by audience type, helping you identify which segments deliver the best returns.


Final Thoughts

TikTok Custom Audiences are an essential tool for advertisers who want to maximize efficiency and drive higher ROI. By focusing on users already familiar with your brand, you increase relevance, reduce costs, and improve conversion rates.

Whether you’re retargeting website visitors, re-engaging app users, or upselling past buyers, TikTok Custom Audiences give you the precision needed to scale profitably.

For brands looking to streamline setup and ensure compliance, partnering with an agency like AGrowth provides added advantages—such as access to pre-approved TikTok agency accounts, technical support, and advanced audience strategies.


Recommended Resources for TikTok Custom Audience

TikTok Custom Audience Guide
Detailed breakdown of how TikTok Custom Audiences work, with setup steps and strategy tips.

Rent TikTok Agency Ads Account
Access high-trust TikTok agency accounts with fewer restrictions, faster approvals, and better scaling potential.

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