To use a bobber for walleye fishing, you can attach a slip bobber to your fishing line. Slip bobbers have a hole through the center that allows the line to slide through freely, making it easy to adjust the depth. Pair the slip bobber with a lightweight jig head, typically one-eighth to one-quarter of an ounce. This setup helps to ensure the bait sinks properly and stays at the desired depth. Determine the depth at which the walleye are feeding and adjust the bobber accordingly. The bobber will keep the bait at a specific depth and make it more visible to passing walleye.