Battleship is a classic board game where players strategically place their ships on a grid and take turns guessing the locations of their opponent's ships. Each player has a fleet of ships, which vary in size, and the goal is to sink all of the opponent's ships before they sink yours. The game is played on two separate grids: one for each player to track their own ships and another to record their guesses about the opponent's ships. Players call out coordinates, and the opponent responds with whether it was a hit or a miss, creating an engaging mix of strategy and luck.