LINEAR FISHING
Simply cast and retrieve your lure horizontally with a lowered rod. You can also vary the retrieval speed with your reel: Accelerations, short pauses, etc.
TRACTION FISHING (ZIGZAG)
When predators are slower and hiding in weedy areas (grassy beds, obstacles) you can choose to let your lure drop into these areas and then use your rod to make it make a zigzagging motion.