The answer to 'how to install grass' is to prepare the soil, lay sod or plant grass seed, and properly water and maintain the new lawn. First, remove any existing vegetation and till the soil to loosen it. Then, level the area and add a layer of topsoil or compost to enrich the soil. You can either lay sod, which provides an instant lawn, or plant grass seed, which takes longer but is more cost-effective. After installing the grass, water it thoroughly and continue watering regularly until the grass is established, usually 4-6 weeks for sod or 6-8 weeks for seed.
Proper lawn installation and maintenance is important for a healthy, lush lawn. If you're unsure about any step or have a large area to cover, it's best to consult a professional landscaper who can assess your specific needs and provide guidance.