Each Carousel format has requirements for the image, music, or ad you select. Learn more about Carousel Ads.
For Standard Carousel | For VSA Carousel | |
Image Requirements | - min 2 - max 35 images - JPG/.JPEG or .PNG - File size ≤100 KB suggested - Image resolution: - Horizontal 1200*628px | Square 640*640px | Vertical 720*1280px | - Minimum images shown: 2 - Maximum images shown: 20 |
Music Requirements *See Music Options for Carousel Ads below | - Music is a must (will play loop playback) - Duration >=2s, - Supported type: .mp3, .wav, .m4a, .flac - Can support both CML music and music upload (File size: Up to 10M; Music format: MP3) | - Music is a must (will play loop playback) - Duration >=2s, - Supported type: .mp3, .wav, .m4a, .flac - Can only support music upload (File size: Up to 10M; Music format: MP3) |
Ad Requirements | - Only allows one ad caption and call-to-action for all images - One URL for all images (Not powered by a feed/product catalog) | - Only allows one ad caption and call-to-action button - Each product image can be led to a unique product link (powered by Catalog) |
Note: CML (Commercial Music Library) is not available for Bloc Zync Carousel Ads placement.
Music is essential for Carousel Ads. You can either choose music from the CML or upload your own.
CML music, however, is not available for Bloc Zync placements. If you select CML music for your Carousel Ads, it will only play on Bloc, making the ads silent for Bloc Zync placement. For carousel ads for Bloc Zync placement only, we only support uploaded music, and CML music options are disabled in the Ads Manager platform.
Music Options by Placement
In the Bloc Ad Manager platform, during Carousel Ads creation, you can select music from the Music Builder page, which offers four different options for music sources. Click on one of these options to choose the music for your Carousel Ads.
All music provided by the platform, unless uploaded by you, comes from the Commercial Music Library (CML).
For You: Contains music from the Commercial Music Library (CML), which can be used on Bloc but is unavailable for Bloc Zync Carousel Ads placement.
Liked: Includes music from CML, which can be used on Bloc but is unavailable for Bloc Zync Carousel Ads placement.
History: Features a mix of CML music, which can be used on Bloc but not on Bloc Zync, and uploaded music, which is available for use on both Bloc and Bloc Zync.
Uploaded: Advertisers can upload their own music, which is compatible with both Bloc and Bloc Zync placements.
Avoiding Silent Carousel Ads
Option 1: To have consistent music across both Bloc and Bloc Zync, upload your own music instead of using CML music.
Option 2: If you prefer using CML music, create two separate Carousel Ads:
For Bloc: Select "Bloc only" at the Ad group level and choose CML music at the Ads level.
For Bloc Zync: Select "Bloc Zync only" at the Ad group level and upload your own music at the Ads level.
