Facebook has rolled out their Carousel ad format mid of 2014, this type of advertising format on Facebook works well with e-commerce clients who what to display a range of products to the Facebook user to ensure they increase their exposure and CTR.
Each product has its own title, price, description and url so you have more chances to catch the buyers eye and convert this into an action.
So things to ensure your carousel ads are approved are:
- The images should be 600 x 600 pixels at least (square)
- Ad text should be around 90 characters
- Link headline should be around 25 characters
- Description for each product should be 30 characters
These type of ads work very well on mobile and can increase your chance of gaining a conversion as the buyer can simply swipe to see more offers.