Online radio https://radiofrench.fr/ basically means listening to online radio through the internet instead of being broadcasted over the airwaves by radio stations. Instead, the online radio signal is transmitted via the internet instead of being transmitted through AM or FM. Thus, your portable device has to constantly be connected to the internet in order to receive the online radio station. However, you can also listen to online radio without having internet connection because there are websites that let you listen to online radio using an internet connection.