Smoke grenades are devices that produce a dense cloud of smoke when ignited. They are commonly used in military operations, training exercises, and by law enforcement for crowd control. The smoke can provide cover for movement or signal locations, making them valuable tools in various tactical situations. These grenades come in different colors and types, each serving specific purposes. For example, colored smoke can be used for signaling or marking positions, while tactical smoke is designed to obscure vision. Smoke grenades are typically activated by a fuse and can be thrown or placed in a desired location for effective use.