Meta Ads Algorithm Update 2026: How Andromeda Changes Everything

What Is Meta's Andromeda Algorithm?

If you've noticed your Meta ad performance shifting in early 2026, you're not imagining things. Meta rolled out Andromeda, a massive overhaul of their ad retrieval and ranking system, and it's fundamentally changing how ads get delivered across Facebook and Instagram.

Andromeda replaced the legacy ad auction retrieval layer with a system capable of evaluating up to 10,000 ads per impression, compared to the previous ceiling of roughly 500. The result? A far more competitive — and potentially more rewarding — landscape for advertisers who understand how to work with it.

For businesses running Meta Ads in Malta and beyond, this isn't a minor tweak. It's a paradigm shift.

How Andromeda Changes Ad Delivery

Broader Candidate Pool

The old system pre-filtered ads aggressively before ranking. Andromeda casts a much wider net, pulling thousands of ad candidates into the ranking stage. This means your ads now compete against a larger field — but also have more opportunities to be shown to highly relevant users who previously might never have seen them.

Creative Volume Matters More

With Andromeda evaluating more candidates, having a diverse creative library gives you more shots on goal. Advertisers running 5-10 creative variations per ad set are seeing significantly better delivery than those running just 1-2. The algorithm rewards creative diversity because it has more signals to optimise against.

Broad Targeting Gets Smarter

Detailed interest-based targeting is becoming less effective. Andromeda's expanded evaluation means the algorithm is better at finding your ideal customer without tight audience restrictions. Many advertisers are seeing better results with broad or Advantage+ audiences than with carefully constructed interest stacks.

What This Means for Your Campaign Structure

The old playbook of hyper-segmented ad sets with narrow audiences and single creatives is dead. Here's what's working in the Andromeda era:

Consolidate Your Ad Sets

Fewer, broader ad sets give Andromeda more data to work with. Instead of splitting budgets across 10 narrow audiences, consolidate into 2-3 broad ad sets and let the algorithm do the heavy lifting. This aligns with Meta's push toward simplified campaign structures.

Feed the Algorithm With Creative

Upload multiple creative formats: static images, carousels, short-form video, and Reels-format content. The algorithm will test and allocate spend toward what performs. Think of each creative as a lottery ticket — more tickets, more chances to win.

Trust the Learning Phase

Andromeda needs data. Resist the urge to make changes during the learning phase (typically 50 conversions). Every edit resets the clock and forces the system to re-learn.

GEM: The New Ranking Signal

Alongside Andromeda, Meta introduced GEM (Generative Engagement Model), a new signal that predicts not just clicks but meaningful engagement. GEM evaluates whether a user is likely to watch a video past the 3-second mark, engage with a post through comments, shares, or saves, and take a conversion action within 24 hours.

This means surface-level engagement bait no longer works. Your creative needs to drive genuine interest, not just thumb-stopping shock value.

How Malta-Based Businesses Should Adapt

For lead generation campaigns in Malta, Andromeda presents both opportunities and challenges. Malta's small market size means broader targeting is essential. With a population under 500,000, narrow audiences were already limiting. Andromeda's preference for broad targeting actually works in your favour in small markets.

Creative quality becomes your competitive edge. In a small market, you're competing against fewer advertisers but for the same users. Better creative means better ad rank, lower costs, and more consistent delivery.

Consolidated budgets perform better. Instead of spreading your budget across five ad sets, put it into one or two and let Andromeda optimise. Small markets need concentrated spend to exit the learning phase quickly.

Practical Steps to Optimise for Andromeda

Audit your account structure. Merge overlapping ad sets. Aim for no more than 3-5 active ad sets per campaign.

Build a creative pipeline. Plan for 5-10 new creatives per month. Mix formats: static, video, carousel, and UGC-style content.

Switch to Advantage+ campaigns for prospecting. Let Andromeda's expanded retrieval do the targeting work.

Monitor frequency closely. In small markets like Malta, broader targeting can still lead to high frequency. Set frequency caps and rotate creative regularly.

Use the Conversions API. First-party data signals help Andromeda make better decisions. Ensure your tracking infrastructure is solid across all platforms.

FAQ

What is Meta's Andromeda algorithm?

Andromeda is Meta's 2026 ad retrieval system that evaluates up to 10,000 ads per impression, replacing the previous system that only assessed around 500 candidates.

How does Andromeda affect my ad costs?

Costs depend on your creative quality and campaign structure. Advertisers with diverse creative and broad targeting are seeing lower CPMs, while those with narrow audiences and limited creative may see costs increase.

Should I change my targeting strategy?

Yes. Andromeda performs better with broad audiences. Consider switching to Advantage+ targeting and letting the algorithm find your ideal customers.

Does Andromeda work differently in small markets like Malta?

The algorithm works the same way globally, but small markets benefit more from broad targeting since narrow audiences were already limiting delivery.

How many creatives should I run per ad set?

Aim for 5-10 creative variations per ad set to give Andromeda enough options to optimise against different user preferences.