I wonder what are Cue Sports.
Cue sports
Cue sports (sometimes written cuesports), also known as billiard sports, 
are a wide variety of games of skill generally played with a cue stick, which is used to strike billiard balls and thereby cause them to move around a cloth-covered billiards table bounded by elastic bumpers known as .
Historically, the umbrella term was billiards. While that familiar name is still employed by some as a generic label for all such games, the word's usage has splintered into more exclusive competing meanings in various
games eventually led to the development of the carom or carambole billiards category – what most non-Commonwealth and non-US speakers mean by the word "billiards". These games, which once completely dominated the cue sports world but have declined markedly in many areas over the last few generations, are games played with three or sometimes four balls, on a table without holes (and without obstructions or targets in most cases), in which the goal is generally to strike one with a , then have the cue ball rebound