The Shotgun has always been a reliable tool of destruction in the Halo franchise. Its high damage makes it perfect for multiplayer rampages, flattening enemies in the blink of an eye. It’s also very useful when dealing with annoying enemies like the Flood, which pop up as a major annoyance in almost every Halo game.
You never want to find yourself on the opposite end of a shotgun in Halo, as it surely means instant death. Combining one pull of the trigger with a quick melee attack is an excellent one-two punch to get you in the lead. Regardless of what Halo game you’re playing, picking up the shotgun is probably a good move.