A pool table is likely to be found in a pub or private rec room, with people bending over the green felt and hitting a white cue ball with a cue stick to sink the rest of the balls into six pockets.
Most individuals will inquire about a game of pool, not billiards, if you’re invited. They appear to describe the same thing.
The Billiard Congress of America claims billiards evolved from a grass game like croquet in the 15th century. Indoor games utilized green tables to represent grass. Originally, billiard balls were pushed by a mace with a large point, rather of a stick, and through a croquet wick. In the 1920s, the game became popular in America, with pocketed tables and shot-calling for points. The name billiards stems from the French words billart and bille.
Billiards tables were popular in gambling parlors where people gambled on horse racing or other events. Because a pool is a collection of bets, pocket billiards became connected with the phrase. Some professional pool players still refer to the game as billiards. Pool is a game with pockets, whereas billiards refers to any tabletop game with a cue stick and cue ball.
A player strikes his cue ball and a red striker ball to move his opponent’s cue ball. The game has no pockets.
That leaves snooker, an even more arcane game. Snooker is essentially billiards since it uses a cue and a cue ball, but it has its own set of rules with 22 balls that must be sunk according to their point values. A snooker table is 10-12 feet long, and its pockets are an inch smaller than a pool table’s.
So, what? The most common kind of pool is the snooker, which is played in a social atmosphere. In the UK, it may refer to the pocket-less variant. Snooker is another game where the rules are explained in great detail.