The answer to 'why is my grass' is that there could be several common causes, such as improper mowing, lack of water, pests, or disease. Symptoms may include discoloration, thinning, or patches of dead grass. Solutions can range from adjusting your mowing height and watering schedule to treating pest infestations or applying fungicides.
If the issue is more severe or you're unsure of the cause, it's best to consult a professional landscaper or lawn care specialist. They can diagnose the problem and recommend the appropriate treatment to get your lawn back to a healthy, lush state.