What Just Changed With My Meta Ads?
If your Meta ads suddenly feel different, two AI systems are the reason: Andromeda and Lattice. Here is what they do — explained with a simple Netflix analogy — and exactly what it means for how you should run ads.
The Systems Summary
If your Meta ads feel like they changed, it is because the engine behind them did. Two AI systems now decide who sees your ads: Andromeda finds the right audience for your creative (it builds a shortlist of people your ad fits), and Lattice ranks your creatives and picks the single best one to show. The simplest way to picture it: Andromeda is Netflix shortlisting 100 movies you might like, and Lattice is Netflix putting the one movie you'll actually watch at the very top. The takeaway for you is the same either way — win with great creative and broad targeting, and stop stacking interests.
The Two-Stage Brain Behind Every Ad
Meta no longer relies on you to hand-pick audiences. Instead, a two-stage AI pipeline decides where your ad goes: first it retrieves a shortlist of people who fit your ad, then it ranks your creatives to pick the best one to show. Click each stage below to see how it works:
Meta's Ad Delivery Brain
How Your Ad Finds the Right PersonAndromeda
What It Does
Andromeda is the AI engine that scans millions of possible ads and, for each person, pulls a shortlist of the ones most likely to fit them. It does this by reading your creative — the visuals, the hook, the copy. Your creative is what gets you into the shortlist.
Key Points
The Netflix Analogy
Think of Netflix. The moment you open it, Netflix instantly shortlists roughly 100 titles it thinks you'll enjoy from its huge library. Andromeda does exactly this for ads — from millions of options, it shortlists the ones that match a user, using your creative as the signal.
1. What is Andromeda? (The 100 Movies Netflix Thinks You'll Like)
Andromeda is Meta's AI retrieval engine. Out of the millions of ads available at any moment, its job is to scan them and, for each individual user, pull a shortlist of the ones most likely to fit that person.
Here is the key part: Andromeda decides what fits by reading your creative — the visuals in your video, the hook in the first few seconds, the words in your copy. It matches the content of your ad to the user, not a list of interests you typed in. In other words, your creative is what earns you a spot on the shortlist.
The Netflix parallel makes it obvious: the second you open Netflix, it instantly shortlists around 100 titles from its enormous library that it believes you'll enjoy. It doesn't show you all 10,000 — it retrieves the relevant handful. Andromeda does the same thing for ads.
Pro-Tip
This is why weak or repetitive creative quietly kills your reach. If Andromeda can't "read" a clear, distinct message in your ad, it struggles to shortlist it for anyone — no matter how much budget you add.
2. What is Lattice? (The #1 Pick at the Top of Your List)
Once Andromeda has built the shortlist, Lattice takes over. Lattice is the ranking engine: it scores each shortlisted creative on how likely it is to get the result you want (a purchase, a lead, a click), ranks them, and then chooses the single best one to actually put in front of the user.
So among all your ads that qualified for a person, Lattice decides which one wins the slot. The stronger the creative, the higher it ranks — and the more often it gets shown.
Back to Netflix: out of those ~100 shortlisted titles, Netflix places the one you're most likely to press play on right at the top of your screen. That final "this is the best match for you" decision is what Lattice does for your ads.
Pro-Tip
Because Lattice constantly ranks creatives against each other, giving it several strong, distinct options to choose from beats giving it one "hero" ad. More quality contenders = more chances to win the top slot.
Andromeda vs Lattice, Side by Side
Same brain, two different jobs. Here is how the two stages compare:
| Aspect | Andromeda (Retrieval) | Lattice (Ranking) |
|---|---|---|
| Its job | Scans millions of ads and shortlists the ones that fit each user. | Scores that shortlist and picks the single best creative to show. |
| Netflix parallel | The ~100 titles Netflix thinks you'll like. | The #1 title placed at the top of your list. |
| What drives it | The content of your creative — it's read to find the audience. | The strength of your creative — the best one wins the slot. |
| Your lever | Make creative that clearly signals who it's for. | Give it several strong, distinct creatives to rank. |
3. What This Means for Your Ad Journey
Once you understand that Andromeda retrieves and Lattice ranks — and that both are driven by your creative — the modern Meta playbook writes itself:
• Put the entire focus on creative. Your creative is now your targeting and your ranking. It is the single biggest lever you control. Invest your time in stronger hooks, clearer messages, and distinct angles (UGC, talking head, founder story, static graphics).
• Go broad and let the AI work. Andromeda is built to search the entire audience for the right match. Keep your targeting as broad as possible and give the engine room to find your buyers — only cap age, gender, and location when your business genuinely requires it.
• Stop stacking interests. Piling interest after interest into an ad set now fights against the system instead of helping it. It shrinks the pool Andromeda can search and adds nothing Lattice needs. That energy is far better spent producing one more strong creative.
In short: the machine got smarter, so your job got simpler. Feed it great creative, give it room, and let it do the targeting and ranking for you.
Pro-Tip
If you want the deeper version of this shift and the full campaign checklist, read our companion guides linked below — this post is the "what changed and why" primer.
Frequently Asked Questions
Official Documentation & Sources
