Its psychologically demonstrated that if a man walking on a street sees a bunch of people waiting in a line for something, he will necessarily try to find out what awaits them there. From this premise starts the idea that, if an app was already installed and reviewed, other people will look more confident to it and will give it a try.
How to create an Ad on Facebook
Below the video, find a written Step by Step tutorial
1. Copy the link of the App you want to Boost installs
2. Login to your Facebook account
3. From the drop down menu in the right-top corner, choose Create Ads button.