Spotify

The most popular streaming music service in the world.
Popular thanks to the convenience and musical base.

Personally for me very soon all became clear.
You just create your own playlist. Well, not you, you're using it, your preferences are being studied and your playlist is being created.
At the moment you can listen to popular playlists. I especially liked the song, we note the heart, do not like it - we press the following.
May choose a specific artist, there is a form of search.
We just listen to what we're interested in and build our own playlist.
It will be ready soon and we can listen to it like our radio.
If we can choose a set of songs we can choose the ones we already have, we can choose the artists and the songs.

Service is free. If you like to listen music offline so you have to pay.

Personally, I'm avoiding everything that's paid for as much as possible. There are too many small payments, additional worries.