Seed spreaders work by distributing seeds evenly over a surface. The process begins by filling the hopper, a container-like part of the spreader, with seeds or fertilizer. Many spreaders allow you to adjust the rate at which the seeds are dispensed. This ensures that the right amount of seed is spread over your lawn or garden. There are two main types of seed spreaders: broadcast (or rotary) spreaders and drop spreaders. Broadcast spreaders fling the seeds in a wide arc, covering a large area quickly, while drop spreaders drop the seeds directly beneath the hopper, providing more precise coverage. The specific operation can vary based on the type and model of the seed spreader, so it's always best to refer to the manufacturer's instructions.