This will allow you to add your sites to it and view other sites that are getting no traffic at all which is nice. You can use more than one website and it will go through and choose which one to show. It will stick to your primary site the most.
People also use this to promote businesses and shops on to get more traffic and views.
The points that you get will make it so that you can show up more and more and move up the latter. Bots cannot use this site due to it makes sure and checks if you are still here by using captas and it will not auto go to sites you have to pick one, and if you do not within so many minutes you will have to do a capta verification.
