What is the recommended best practice for designing video ads for Reddit's mobile-first audience?
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Correct answer: Using a 4:5 aspect ratio.
Why this is the answer
Reddit is a mobile-first platform, so video ads should be optimized for vertical or near-vertical viewing. A 4:5 aspect ratio takes up more screen space on mobile devices, improving engagement and visibility. Landscape mode or desktop-focused designs are less effective. Long text descriptions can overwhelm mobile viewers and reduce ad performance.
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