AdFly is a well-known URL shortener that pays you each time someone visits one of your links made shorter using this service. It can be understood quite easily: you can use one of your normal links that point visitors to a certain page and run it through this platform. When someone tries to visit that specific web page, they will have to watch an advertisement before the actual page is loaded.
Each time this happens, AdFly rewards you with a bit of money. The user interface of this app is very intuitive, not only you can create short links, but you can also manage your earnings. As you can probably guess, you will either have to create a publisher account, or you can use an existing one in case you're not new here.
After everything is set up, you can start creating new links, check various statistics, and even withdraw your earnings. Each time you have a link to be shared with a large audience, you can monetize it using AdFly and earn extra cash for your pocket.