Services
These are all the services currently integrated into listrr.pro. All these services serve different purposes.
External Services
These are services from external developers that have integrated support into their project
Notifiarr
List Providers
Here you can populate your lists to. These services are good, if you want to use your lists with other tools that havent integrated listrr.pro directly.
Sonarr
Have a look here for further explanation.
Sonarr Bridge
The Sonarr Bridge is used to import listrr.pro lists into your Sonarr instance.
Radarr
Have a look here for further explanation.