What does it mean to pick sides?

What does it mean to pick sides?

1. : to support one person or cause and not the other. You are both my friends, so I don’t want to choose/pick sides. : to decide which players will be on each team. We need to choose/pick sides before we start playing.

Do you have to pick a side?

No we don’t. Sometimes you are forced onto a side in an argument or debate but you don’t have to take a side if you don’t wish to.