TL;DR: Meta targeting has changed fundamentally since iOS 14. Interest targeting is far less reliable; Custom Audiences built from your own customer data and AI-powered Advantage+ targeting now perform significantly better. The best 2026 strategy combines first-party data with intelligent AI automation.
The Targeting Dilemma After iOS 14
Before iOS 14, Meta's targeting was often the decisive advantage for advertisers: extremely precise audience definitions by interests, behavior, demographics, job titles, life events.
After iOS 14, Meta is missing around 30–40% of tracking data from Apple devices. This makes precise interest targeting significantly less reliable. Meta responded with strong AI optimization – but the rules have changed.
Quick Answer: Meta Ads audiences in Austria work best in 2026 with Custom Audiences (your own customer lists and website visitors) for remarketing, and Advantage+ Broad Targeting for new customer acquisition. Classic interest targeting is much less reliable since iOS 14 and should only be used as a supplementary filter.
The Most Important Targeting Types in 2026
Custom Audiences
Custom Audiences are based on your own data. These are the most valuable audiences because they reflect real connections to your business.
Types:
- Website Custom Audience: People who visited your website (via Meta Pixel)
- Customer List: Uploaded email addresses of customers or newsletter subscribers
- Video Views: Users who watched at least X% of one of your videos
- Lead Form Engagers: Users who interacted with your lead form
- Instagram/Facebook Engagers: Users who engaged with your organic posts
Custom Audiences are ideal for remarketing and customer retention.
Lookalike Audiences
Lookalike Audiences let Meta create an audience resembling your best customers. You provide a source (e.g., your 100 best customers) – Meta finds millions of similar people.
Important: The quality of the source audience is decisive. A Lookalike from your paying customers is more valuable than one from all website visitors.
Lookalike sizes:
- 1% Lookalike: Very similar, smaller audience
- 3–5% Lookalike: Broader reach, slightly less precise
- 10% Lookalike: Maximum reach
Interest and Behavior Targeting
Classic Meta targeting by interests like "Digital Marketing" or "Home Improvement" has become significantly less reliable after iOS 14. Interest targeting is based on:
- Pages someone has liked
- Content someone has engaged with
- App usage behavior (limited after iOS 14)
Recommendation 2026: Use interest targeting as an orientation aid, not a primary mechanism. In most tests, Broad Targeting campaigns perform similarly or better.
Advantage+ Audience (Broad Targeting)
Meta's AI-based targeting without manual restrictions. Meta decides itself who sees your ad – based on your campaign objective and creative assets.
When it works:
- Sufficient budget (min. €500/month for the ad set)
- High-quality creatives carrying the right message
- Clear conversion event (not just "traffic")
Which Audience for Which Goal?
| Campaign Goal | Best Audience |
|---|---|
| Acquire new customers | Advantage+ or 1–3% Lookalike |
| Reactivate warm leads | Website Custom Audience (30 days) |
| Upsell existing customers | Customer List Custom Audience |
| Brand Awareness | Broad Targeting with video |
Audience Size: Bigger Isn't Always Better — But Too Small Is a Problem
A common mistake: defining audiences too narrowly. An audience under 100,000 gives Meta too little room for algorithm optimization.
Rules of thumb:
- Conversion campaigns: at least 500,000–2 million in target region
- Traffic/Awareness: can be broader
For Austria alone (9 million inhabitants), this means: narrow audiences under 50,000 rarely perform well. Better to target Germany and Austria together, or use Advantage+ without manual restrictions.
GDPR and Custom Audiences
When uploading customer data (email lists) for Custom Audiences, GDPR requirements apply:
- You need a legal basis for processing (consent or legitimate interest)
- Data is hashed (anonymized) by Meta before use
- You must reference this processing in your privacy policy
Frequently Asked Questions
What is the difference between a Custom Audience and a Lookalike Audience? A Custom Audience is built from your own data — website visitors, email contacts, or video viewers. A Lookalike Audience finds new people who resemble your existing customers. Custom Audiences are ideal for remarketing; Lookalike Audiences for acquiring new customers.
Does interest targeting on Meta still work well? Since iOS 14, interest targeting has lost significant reliability. In most tests, Advantage+ Broad Targeting campaigns perform similarly or better. Interest targeting still works as a supplementary filter but shouldn't be your sole primary mechanism.
What minimum audience size do I need for Meta Ads in Austria? For conversion campaigns, your audience should contain at least 500,000 people — which can be challenging within Austria alone. Better to target Germany and Austria together, or use Advantage+ without manual restrictions.
Is it legal to upload customer lists to Meta? Yes, under GDPR-compliant conditions. You need a legal basis for processing (consent or legitimate interest), must disclose the processing in your privacy policy, and Meta hashes the data automatically before use.
The targeting landscape at Meta has changed fundamentally – and those still using 2020 methods are wasting budget. The best audience strategy in 2026 combines your own first-party data (Custom Audiences) with intelligent AI automation (Advantage+). If you want to restructure your Meta Ads, we're happy to help.