Facebook has updated its mobile app unit by allowing app developers and companies to send targeted adds to users, reminding them to open up downloaded apps.

The new mobile ads are expected to prompt consumers into playing, listening or shopping on apps currently installed on their phone.

Facebook said in a statement that the new features are designed to help businesses reach people who have already downloaded their apps and direct them back into specific features, content or products within the app.

"Businesses can now choose from seven different calls to action within mobile app ads. These include universal actions like ‘Open Link’ or ‘Use App,’ along with more vertical-specific calls to action: ‘Shop Now,’ ‘Play Game,’ ‘Book Now,’ ‘Listen Now,’ or ‘Watch Video,’" social networking firm said.

"From these calls to action, businesses with deep links can send their existing customers directly into customised, specific locations within their apps, such as new content, sales or product promotions."

Reports reveal that the number of advertisers purchasing the ads have almost tripled during the initial six months of 2013

Facebook recently revealed plans to tweak its News Feed advert algorithm in efforts to improve user feedback.