Companies integrate with Facebook to make their apps more social:
Apps on Facebook
While social games are currently the most recognized apps on Facebook, new types of apps are quickly emerging. They give people more ways to experience music, news, TV, and everyday interests such as cooking, fitness and travel with their friends.
Facebook Platform for mobile enables the world's top iOS, Android and web developers to create engaging mobile apps that integrate Facebook’s social and personalization features.
Websites drive growth and engagement through Facebook's social plugins, such as the Like button, Comments plugin and Login button, or through more advanced integrations like Timeline apps. These integrations make it easy for people to sign into their favorite websites quickly with their Facebook accounts, like and comment on content around the web, and add apps on their timeline to express what they love.
Apps Bring Your Timeline Experience to Life