What happens in pool if the cue ball does not touch anything?

Answer 1

if the cue does not hit anyhting or hits the black/ball of enemies designation it is considered a faul. based on rules diffrent things happen like 3 fauls you loose but generally a faul enables the opponent or next in order 2 turns in a row (considering they do not score a faul)

ADD: It is an antiquated game played mainly in Europe and Australia that allows the incoming player 2 shots. World Standard is that a foul results in a ball in hand to the incoming player. The 3 foul loss rule is only used in 9 ball.