Facebook Carousel Ads are adverts that contain three to five images and links. They are displayed on different devices as adverts, and are organized with the Facebook Business Manager. Facebook Carousel Ads can be created in Facebook's Advertising Manager and delivered to the social network. They can also be edited using tools such as Powereditor and Create.
Carousel ads are designed to lead users to different parts of a website, to enable them to download apps and to support the branding and management of companies. They are suitable both as direct response ads and as part of a branding campaign.
Facebook has been offering Carousel Ads since June 2014. Before, they were called Multi-Product-Ads. Facebook itself conducted a study of 9000 advertisers to verify effectiveness. Compared to standard link ads, Carousel ads reduce costs per acquisition by between 30% and 50%. The costs per click can also be reduced by 20% to 30%. By combining a maximum of five images with links, advertisers can advertise different products, services, events and insights into the company without paying for multiple advertisements.
Basically, different aspects of a company can be presented and highlighted with Facebook Carousel Ads. The platform allfacebook. de presents some innovative possibilities.
Facebook recommends adhering to certain design guidelines so that the Carousel ads can also be presented in an optimized way on different devices. 
In addition to the optical properties of Carousel Ads, content criteria can also help to increase the effectiveness of advertisements. Target groups can be selected, for example, to display the ads only to specific groups of people and users. In this way, you can not only control campaigns, but also carry out retargeting.
Facebook's advertising format increases the effectiveness of delivering ads and reduces costs. At the same time, marketers are given a wide variety of options to attract the attention of recipients. Carousel Ads offer insights from different perspectives - whether it is a product or a sequence of other images. The interaction rates of Carousel Ads are correspondingly high - which is why the costs per acquisition and the costs per click can be reduced with Carousel Ads.
The technologies behind it are also the reason why Facebook has a great deal to do with the rules of social media marketing.  For example, Carousel Ads automatically pre-sorts the images according to their performance, therefore if desired, the most clicked images and links can be found at the top of the ad. Also, the so-called ad sequencing, in which the reach and frequency for advertisements can be defined, and the custom audiences for exact targeting are reasons for Facebook's current technological leadership in the field of advertising on social networks.