Why does my plant have brown spots on the leaves and how can I treat it?

Brown spots on plant leaves can be caused by various factors such as overwatering, nutrient deficiencies, pests, or diseases. To treat it, you can start by adjusting your watering schedule, ensuring proper drainage, and providing the plant with adequate sunlight. You can also try using a fungicide or insecticide if pests or diseases are the cause. If the issue persists, consult a plant expert for further assistance.