> Quick answer: Select Facebook Reels under Stories and Reels in Manual Placements at ad set level, or use Advantage+ to include it automatically. Use 9:16 vertical video at 1440x2560px, keep critical elements out of the top 14%, bottom 35%, and side 6% safe zones, and include audio. Campaigns using native 9:16 video with audio see 2x higher delivery and 34.5% lower cost per result.
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What are Facebook Reels ads?
Facebook Reels ads are immersive, full-screen vertical placements that appear between organic Reels content. They take over the entire screen and feel native to the viewing experience.
Definition and immersive format
Reels ads fill the screen completely. No competing content sits beside them. That gives your creative undivided attention from viewers already in scroll mode.
Where Reels ads appear
Your ad can show across three entry points. The dedicated Reels Tab, Reels in Explore, and Reels In-Feed Units. Each puts your creative in front of users already in a full-screen mindset.
Sound-on by default
Reels default to sound on. Audio plays automatically. Per Meta for Business, over 75% of Reels views on Instagram happen with sound on. That is a creative advantage most placements don't offer.
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How to select Reels placement in Ads Manager
Placement selection happens at the ad set level. Not the campaign level. Not the ad level.
Navigate to the Placements section
Open Ads Manager. Create or edit a campaign. At ad set level, scroll to the Placements section. You have two options.
Option 1: Advantage+ placements (automatic, recommended)
Choose Advantage+ placements and Meta's system distributes your budget across all eligible placements, including Facebook Reels. Meta recommends this for most advertisers. The algorithm finds the best delivery mix automatically.
Option 2: Manual placements
Choose Manual placements to control exactly where ads run. Scroll to Stories and Reels. Check the Facebook Reels box. Per Meta's Ads Guide, Instagram Reels is available here too if your account is linked.
Why 6+ placements is recommended
Meta recommends selecting at least six placements when going manual. More placements give the system more room to optimize. Fewer placements restrict delivery and can increase costs.
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Facebook Reels ad creative specifications
Per the Facebook Ads Guide, these are the confirmed specs for Facebook Reels placements.
Video aspect ratio: 9:16 vertical recommended
Use 9:16 vertical. That is the recommended ratio for Reels. Horizontal or square video gets letterboxed or cropped and loses the full-screen impact.
Resolution: 1440 x 2560 pixels
Target 1440 x 2560 pixels. Higher resolution keeps your creative sharp on modern mobile screens.
Video duration, file types, audio, and captions
Supported file types. MP4, MOV, and GIF. Use H.264 compression. Audio must be stereo AAC at 128kbps or higher. There is no maximum video duration, but shorter videos tend to perform better in the Reels context. Video files must not contain edit lists in file containers.
Captions are optional. They are recommended for accessibility and for viewers who watch without sound.
Safe zone and text overlay guidance
This is the most common creative mistake. UI overlays, captions, and the profile handle cover specific areas of the screen. Place all key text, logos, and creative elements in the middle zone only.
Leave these areas clear:
- 14% at the top of the frame
- 35% at the bottom of the frame
- 6% on each side
Primary text max is 40 characters. Headline max is 55 characters.
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Creative best practices for Reels ads
The specs above define the floor. These practices push performance higher.
Build for vertical screen
Design native 9:16 from the start. Repurposed horizontal or square video wastes screen real estate. A full-screen vertical creative feels organic and commands more attention.
Include audio and quality sound
Sound is on by default. Use it intentionally. Voiceover, music, or sound effects make the ad feel native to Reels. Silent ads miss the most differentiating feature of the format.
Key messages in safe zone, hook at start
Put your most compelling moment in the first two seconds. Viewers swipe fast. End with a clear call to action inside the safe zone so it isn't covered by UI overlays.
Performance gains: 2x higher delivery, 34.5% lower cost per result
Campaigns using 9:16 video, audio, and safe-zone creative placement see 2x higher delivery to Reels placement. Those same campaigns achieved 34.5% lower cost per result compared to image ads. Source. Meta for Business.
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Promoting existing Reels vs. uploading new creative
You have two paths when it comes to Reels creative.
Using an existing Reel
Link a Reel you already own from your Facebook Page. For branded content, the creator must toggle "Allow business partners to promote" or manually accept a permission request before you can boost it.
Uploading new creative: placement asset customization
Use placement asset customization at the ad level to upload a Reels-specific video. This lets you tailor the creative without changing your main ad image or video for other placements.
Advantage+ Creative for automated optimization
Enable Advantage+ Creative at ad level. Meta will automatically test variations and optimize delivery toward the best-performing version. It is a low-effort way to improve Reels performance over time.
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A/B testing Reels placement
Testing tells you what actually drives results. Don't assume.
Test native Reels creative vs. repurposed assets
Create one ad with a native 9:16 Reels video. Create another using a repurposed horizontal asset. Run them head-to-head. Native creative almost always wins, but the margin reveals how much the format matters for your audience.
Compare Reels + other placements in one campaign
Run one ad set with Reels included. Run another without. Compare cost per result across both. This shows whether Reels is pulling weight or just absorbing budget.
Use insights to optimize your Reels strategy
Review placement-level breakdown in Ads Manager. Identify which placements drive the lowest cost per result. Shift budget toward top performers. When a Reels creative gets stale, use Coinis Revise with Smart Resize to adapt your existing assets to 9:16 fast and refresh the rotation without starting from scratch.
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Frequently Asked Questions
Can I run Facebook Reels ads without a video?
Yes. Image ads can run on Reels placements using the 9:16 format at 1440x2560px. Per the Facebook Ads Guide, the same safe zone rules apply. keep the top 14%, bottom 35%, and sides 6% free from text and logos.
Does Facebook Reels placement require a separate campaign?
No. You select Reels at the ad set level within any eligible campaign. Use Manual placements and check Facebook Reels under Stories and Reels, or use Advantage+ placements to include it automatically alongside other placements.
What happens if my video isn't 9:16 vertical?
Meta will attempt to adapt it, but performance typically suffers. Per Meta for Business, campaigns using native 9:16 video with audio see 2x higher delivery to Reels placement compared to other formats.
How many placements should I select when setting up Reels ads manually?
Meta recommends at least six placements when using Manual placements. More placements give the algorithm room to optimize delivery and reduce cost per result.