The 1-Up item is an item that has a picture of Bomberman or a heart on it. It grants the player an additional try at the stage in the event that they die. This type of item is a common and widespread type in video games, especially exclusively single player games.
Instead of granting the player an additional try directly, a bonus game chance is given. After the player beats a level, they can get to a subsequent bonus level to score lives and points.