A lawn mower is a machine used to cut grass to an even height, helping maintain a neat and tidy lawn. They come in various types, including push mowers, self-propelled mowers, and riding mowers, each designed for different yard sizes and user preferences. Most mowers use a rotating blade to trim the grass, and many models allow for height adjustments to achieve the desired cut. Lawn mowers can be powered by electricity, gasoline, or batteries. Electric mowers are quieter and more environmentally friendly, while gas-powered mowers tend to be more powerful and suitable for larger areas. Regular maintenance, such as sharpening blades and changing oil, is essential for optimal performance.