Facebook ads are a robust advertising platform that allows businesses to target users based on detailed criteria, including demographics, interests, behaviors, and more. Advertisers can create ads in various formats such as image, video, carousel, and slideshow. These ads appear in Facebook's News Feed, sidebar, and in Instagram feeds, among other places. Facebook also offers powerful analytics tools to help advertisers track ad performance and user engagement, enabling them to refine their campaigns and improve return on investment.