How to Target the Right Audience on Facebook Ads

Wrong targeting on Facebook Ads is like shouting in a packed stadium: someone might hear you, but you're paying for everyone. Correct targeting is like a direct conversation with the right person. Here's how each audience type works and when to use it.

The 3 Types of Facebook Audiences

Core Audiences - Criteria-Based Targeting

Core Audiences let you target by demographics (age, gender, location), interests (fitness, real estate, food), and behaviors (online shoppers, frequent travelers). It's what most people understand by "Facebook targeting."

When to use them: for cold campaigns (new people who don't know you). They're the starting point, not the destination.

Practical rules:

• Optimal size: 100K-500K for the United States (adjust for local campaigns)
• Don't combine too many interests (risk of audience too small)
• Use "Narrow Audience" (AND logic) for precision: "interested in fitness" AND "business owner" is more precise than "interested in fitness" OR "business owner"
• Always exclude existing customers and recent converters

Custom Audiences - Your Existing Data

Custom Audiences are built from people who already interacted with you: site visitors, email list, Facebook/Instagram engagers, video viewers, app users.

Types and when to use each:

• Website visitors (last 30/60/90 days) - retargeting, the most profitable audience
• Email/phone list - target existing contacts with specific offers
• Video viewers (25%/50%/75% watched) - people who showed interest but didn't visit your site
• Page/IG engagers (last 30/90/365 days) - people who engaged with your content
• Form openers who didn't submit - the warmest leads who got cold feet

Custom audiences are smaller but convert 3-5x better than cold audiences. This is where your retargeting budget goes.

Lookalike Audiences - Finding Similar People

Lookalike audiences are Facebook's way of finding new people who resemble your existing customers. You provide a source (customer list, converters, top spenders), and Facebook finds similar profiles.

Percentage options:

• 1% Lookalike - most similar, smallest audience, highest quality
• 1-3% Lookalike - good balance of quality and scale
• 3-5% Lookalike - larger reach, lower precision
• 5-10% Lookalike - essentially a broad audience with slight targeting

Best sources for Lookalikes:

1. Paying customers (not just leads)
2. High-value customers (top 25% by revenue)
3. Converters from the last 90 days
4. Email subscribers who engaged (opened/clicked)

Minimum source size: 100 people, but 1,000+ gives much better results.

Audience Strategy - How to Combine Them

Campaign 1: Cold (60-70% of budget)

• Lookalike 1-3% based on customers
• Core audiences based on relevant interests
• Test 3-4 ad sets with different audiences simultaneously

Campaign 2: Warm Retargeting (20-25% of budget)

• Video viewers (50%+) last 30 days
• Page/IG engagers last 30 days
• Website visitors last 30 days (exclude converters)

Campaign 3: Hot Retargeting (10-15% of budget)

• Website visitors last 7 days
• Add to cart but didn't purchase (e-commerce)
• Form openers who didn't submit
• Pricing page visitors

Common Targeting Mistakes

1. Audience too narrow - under 50K people means high CPMs and limited delivery
2. Too many interests stacked - Facebook can't find enough people
3. Not excluding converters - you're paying to show ads to existing customers
4. Using only Core audiences - ignoring Custom and Lookalike means ignoring your most valuable audiences
5. Not testing - running one audience and hoping for the best
6. Refreshing Lookalikes too rarely - update your source lists monthly

Frequently Asked Questions

What's the ideal audience size on Facebook?

100K-500K for most businesses. Too narrow (under 50K) means high CPMs. Too broad (over 1M) means low relevance.

What audience type performs best?

Lookalike audiences based on existing customers or high-value leads. They combine the scale of cold audiences with the relevance of custom audiences.

Should I use exclusions?

Yes, always. Exclude existing customers and recent converters from cold campaigns to avoid wasting budget on people who already bought.