Meta Flexible Ad Format:
The Quiet Powerhouse
Most Advertisers Ignore
One format. Every placement. Unlimited creative combinations. Here's why Flexible Ad Format is the highest-leverage change you can make in your Meta account right now.
Meta Flexible Ad Format:
The Quiet Powerhouse
Most advertisers are running standard ad formats in 2026. The ones outperforming them switched to Flexible months ago — and haven't looked back.
Flexible Ad Format lets Meta automatically combine your uploaded creative assets — images, videos, and text — into the optimal combination for each individual user. One ad set can display dozens of distinct creative combinations across different users simultaneously.
A single Flexible ad adapts automatically to every Meta placement: Feed, Stories, Reels, In-Stream, Marketplace, and Audience Network. No manual resizing, no placement-specific duplicates. One upload, every placement — with format adjustments made in real time.
Every Flexible ad is running a multivariate creative test by design. Andromeda tracks which asset combinations drive the best outcomes per audience segment and shifts distribution toward winning combinations automatically — without you changing anything.
Instead of building individual ads, you build an asset inventory. Upload every image, video, headline, and body copy variant you have. Flexible treats them as ingredients — assembling the best combination for each impression.
Because Flexible runs many combinations simultaneously, it generates creative performance data far faster than standard formats. You identify winning assets in days, not weeks.
Accounts using Flexible Ad Format report CPM reductions of 15–25% versus standard ad sets running the same creative inventory. Andromeda rewards format flexibility by prioritising ads that can adapt to more placement contexts.
Flexible Format vs Standard Ads: The Comparison
How to Set Up Flexible Ad Format
Flexible Ad Format is available within all standard Meta campaign objectives — Conversions, Traffic, Lead Generation, and App Installs. Here's how to enable it:
Step 1 — Create a New Ad
Inside your ad set, click Create Ad and select the Flexible Ad Format option (it may appear as "Flexible creative" depending on your account interface). If you don't see it, ensure your campaign objective supports it — Advantage+ campaigns default to Flexible Format automatically.
Step 2 — Upload Your Asset Inventory
Upload everything you have: multiple images (1:1 and 9:16 ratios), multiple videos (under 15s recommended), multiple headlines, and multiple body copy variants. The more assets you upload, the more combinations Andromeda can test. Aim for minimum 5 images, 3 videos, 5 headlines, and 3 body copy options.
Step 3 — Set Creative Optimisation to Auto
Leave Creative Optimisation set to Automatic — this tells Andromeda to choose the best combination for each impression rather than showing the same combination to everyone. Overriding this defeats the purpose of Flexible Format.
Key insight: Flexible Ad Format is not just a convenience feature — it's the interface through which Andromeda expresses its full capability. Standard single-image or single-video ads constrain Andromeda to one choice. Flexible Format gives the algorithm a library to work from. This is the single highest-leverage format change you can make in your Meta account today.
When Not to Use Flexible Format
Flexible Format is almost always the right choice — but there are edge cases where standard formats work better. If your brand has strict visual consistency requirements where certain image-headline combinations must never appear together, standard formats give you more control. Similarly, if you're running a limited-time promotion where the specific offer details must appear in every combination, you may want to build the offer into every asset rather than letting Andromeda mix freely.
Want a Flexible Format Setup Review?
I'll audit your current ad creative structure and show you exactly how to transition to Flexible Ad Format — with an asset checklist customised to your business.
Meta Flexible Ad Format — FAQ
Flexible Ad Format automatically combines your uploaded creative assets — images, videos, headlines, and body copy — into the optimal combination for each user and placement. It adapts to every Meta placement automatically and runs multivariate creative testing by default.
Dynamic Creative was Meta's earlier iteration of automated creative combinations. Flexible Ad Format is its successor, built specifically for Andromeda. It supports more asset types, more combinations, broader placement coverage, and tighter integration with Advantage+ campaigns.
It's available for Conversions, Traffic, Lead Generation, App Installs, and Awareness objectives. Advantage+ Shopping Campaigns use a version of Flexible Format by default. Not all objectives support every asset type combination.
Minimum: 5 images, 3 videos, 5 headlines, 3 body copy options. Optimal: 10+ images, 5+ videos, 10 headlines, 5 body copy variants. More assets give Andromeda more combinations — directly improving its ability to find the best match for each user.
You can set asset groups within Flexible Format to prevent certain image-text combinations from appearing together. This gives you guardrails while still allowing Andromeda to optimise within those boundaries.