How To Share Spotify Playlist With Someone (Share With Friends)

Do your friend that you share the list with have to have a Spotify account as well?

I don’t understand what he is saying so confused

I have a few questions.
One: If I want to share All of my different playlists with my friend so they can have the same access to all of the different playlists I have how would I do that?
Two: Can my friend delete any of my songs in my playlists if they are in the same area?
Three: When we share songs in this playlist collaborate if I am listing to one of those songs will it make it so that the other person is listing to the same song or will it change if you are listing to a song and the other person changes the song?

WAY TOO FAST BRO!!!