What is the connection between Ashley Madison and Facebook?

Ashley Madison, a website designed to facilitate extramarital affairs, has no direct corporate connection with Facebook, the social networking giant. However, their relationship primarily lies in the realm of online advertising and platform usage. Before the data breach scandal Ashley Madison experienced in 2015, Ashley Madison might have used Facebook's advertising services to target potential users, leveraging the social platform's extensive reach and sophisticated targeting capabilities. Furthermore, individuals on Ashley Madison could have optionally linked their Facebook profiles for easier sign-in or profile information importing. Such connections are standard among many online services that want to streamline user experience by integrating with larger social media platforms.