A Facebook ad in social media refers to a paid promotional content displayed on the Facebook platform. These ads are designed to target specific audiences based on demographics, interests, behavior, and other criteria. Advertisers create engaging visuals or copy to convey their message and encourage users to take desired actions, such as visiting a website, making a purchase, or liking a page. Facebook provides various ad formats, including image ads, video ads, carousel ads, and more, to suit different marketing goals. Through strategic ad placement and optimization, businesses can effectively reach their target audience and achieve specific objectives, contributing to their overall social media marketing strategy.