How Many Seconds Should a Reels Ad Video Be?
What is the ideal length for a Reels ad video? We explain why 15 seconds is the most effective length and the first-3-seconds rule.
The most effective length for a Reels ad is often 15 seconds: it grabs attention in the first second, delivers the message clearly and keeps the completion rate high.
Why 15 seconds?
Attention span on social media is very short. A 15-second video raises the chance of being watched end to end, which helps the algorithm show it to more people.
The first 3 seconds rule
The most critical part is the first 3 seconds. The product or a striking visual should be on screen right away; it must make the viewer think 'this is worth watching'.
The right format
- 9:16 vertical format (full screen)
- Suited to silent viewing, captions if needed
- A single, clear message / call to action
Medya Mühendisi turns these formats into 15-second vertical ad videos from a product photo, raw video or brand idea.
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