Ludo is a board game, usually for two to four players. Each player has four pawns. The objective is to get all four pawns around the board and "home" before anyone else does.
The board consists of a linear track of spaces with four extra corridors (one for each player) spaced equally throughout. A player's home is at the end of the corridor.
A die is used to control play. Players take it in turn to roll the die. They then chose which of their pawns in play to move (a pawn must be moved into play by rolling a one).
If a player lands a pawn on a space occupied by an enemy pawn then the enemy pawn is sent back to the enemy player's home, so there is a minor stragegic element to the game. Often, rolling a six nets a player a bonus roll.
After circumnavigating the board, the pawns are moved up the coridoor. A player cannot move his pawns into an enemy's corridor, so the corridor is a "safe zone". Usually a player must get his pawns into their home by exact count, which can be really frustrating/fun.