A multi-line slot is a slot game with more than one way to win – that is, it has more than one payline.
Think of it like this: You've got your usual straight-line path to the win, but then someone took a marker and drew more lines all over the place! Bingo! Those are your extra paylines. You're not just playing in a straight line anymore; you've got diagonals, zigzags, the works! More chances to hit that sweet, sweet winning combo. But remember, each extra line might cost you a bit more, so keep an eye on your balance while you're having fun!