s!help

After you invited Sonens you can discover all its feature with s!help command.
With the command s!play <song name> Sonens will enter in your discord channel and it will start playing the music that you have requested. 
If you don't remember exactly the name of your song, you can search it with the command s!search <song title>. Sonens will show you the first 10 results on YouTube and you can choose from one of them.
Sonens has also a queue for the songs and you can skip it with s!skip command or stop all the queue using s!stop command.
If you want delete the message that you and the bot have sent, you can use the command "clear + <number of message>"